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A STUDY OF NEW ENGLAND SEISMICITY

Quarterly Earthquake Report



July-September, 2005



New England

Seismic Network



Weston Observatory

381 Concord Road

Weston, MA 02493





NEW ENGLAND SEISMIC NETWORK

John E. Ebel, Principal Investigator

Weston Observatory

Dept. of Geology and Geophysics

Boston College

381 Concord Road

Weston, MA 02493

Email: ebel@bc.edu

Award # 04HQAG0020

Prepared by Anastasia Macherides Moulis

and Dina Smith

October 1, 2005

for

United States Geological Survey

905 National Center

12201 Sunrise Valley Drive

Reston, Virginia 20192

Notice

Network operation supported by the U.S. Geological Survey (USGS), Department of the Interior, under USGS award number 04HQAG0020. The views and conclusions contained in this document are those of the authors andshould not be interpreted as necessarily representing the official policies,either expressed or implied, of the U.S. Government.

Quarterly Earthquake Report

July-September, 2005

Table of Contents

Introduction

The New England Seismic Network (NESN) is operated by the Weston Observatory (WES) of Boston College. The mission of the NESN is to operate and maintain a regional seismic network with digital recording of seismic ground motions for the following purposes: 1) to determine the location and magnitude of earthquakes in and adjacent to New England and report felt events to public safety agencies, 2) to define the crust and upper mantle structure of the northeastern United States, 3) to derive the source parameters of New England earthquakes, and 4) to estimate the seismic hazard in the area.

This report summarizes the work of the NESN for the period July-September, 2005. It includes a brief summary of the network's equipment and operation, and a short discussion of data management procedures. A list of participating personnel is given in Table 1. There were 7 earthquakes that occurred within or near the network during this reporting period. Phase information for these earthquakes is included in this report.

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Current Network Operation and Status

The New England Seismic Network of Weston Observatory of Boston College currently consists of 12 broadband three-component and 8 analog strong-motion stations. The coordinates of the stations are given in Table 2, and maps of the weak- and strong-motion networks are shown in Figures 1 and 2, respectively. The 12 stations consist of Guralp CMG-40T three-component sensors. Ground motions recorded by these sensors are digitized at 100 sps with 16-bit resolution. Additional gain-ranging provides 126 dB dynamic range. These stations are operated in dialup mode with waveform segments of suspected events transmitted in digital mode to Weston Observatory for analysis and archiving. Weston Observatory also maintains 8 SMA-1 strong-motion instruments in New England.

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Seismicity

There were 7 earthquakes that occurred in or adjacent to the NESN during this reporting period. A summary of the location data is given in Table 3. Figure 3 shows the locations of these events. Figure 4 shows the locations of all events since the beginning of network operation in October, 1975.

Table 4 gives the station phase data and detailed hypocenter data for each event listed in Table 3. In addition to NESN data, arrival time and magnitude data sometimes are contributed for seismic stations operated by the Geological Survey of Canada (GSC), the Lamont-Doherty Cooperative Seismographic Network, and the US National Seismic Network. Final locations for this section were computed using the program HYPO78. For regional events (those too far from the NESN to obtain accurate locations and magnitudes) phase data are given for NESN stations, but the entry in Table 3 lists the hypocenter and geographic location information adopted from the authoritative network. Accordingly, the epicenter is plotted on the maps using the entry from Table 3.

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Data Management

Recent event locations are available at http://aki.bc.edu/cgi-bin/NESN/recent_events.pl. Waveform data are saved in Nanometrics, ASCII, and SEED formats and are available by contacting, Anastasia Macherides Moulis, via email. Earthquake lists can be found at www.bc.edu/research/westonobservatory/northeast/eqcatalogs/. Currently available on the Weston Observatory web page is the full catalog of northeastern U.S. earthquake activity to the present time. This will be updated as new Northeastern U.S. Seismic Network Quarterly Earthquake Reports are produced.

For more information on matters discussed in this report or general earthquake information (reports, maps, catalogs, etc.) consult our web site www.bc.edu/westonobservatory or contact:





Anastasia Macherides Moulis

Weston Observatory

381 Concord Road

Weston, MA 02493

Voice: 617-552-8325 / FAX: 617-552-8388 / Email: anastasia.macherides.1@bc.edu



Dina Smith

Weston Observatory

381 Concord Road

Weston, MA 02493

Voice: 617-552-8335 / FAX: 617-552-8388 / Email: dina.smith.1@bc.edu



Prof. John Ebel

Weston Observatory

381 Concord Road

Weston, MA 02493

Voice: 617-552-8319 / FAX: 617-552-8388 / Email: ebel@bc.edu

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Explanation of Tables

Table 1: List of personnel operating the NESN

Table 2: List of Seismic and Strong Motion Stations

  1. Code = st ation name
  2. Lat = station latitude, degrees north
  3. Long = station longitude, degrees west
  4. Elev = station elevation in meters
  5. Location = geographic location
  6. Operator = network operator

Table 3: Earthquake Hypocenter List

  1. D ate = date event occurred, Yr (year)/Mo (month)/Dy (day)
  2. Time = origin time of event, Hr (hour):Mn (minute):Sec (second)

    in UCT (Universal Coordinated Time, same as Greenwich Mean Time)
  3. Lat = event location, latitude north in degrees
  4. Long = event location, longitude west in degrees
  5. Depth = event depth in kilometers
  6. Mag = event magnitude
  7. Int = event epicentral intensity
  8. Location = event geographic location

Table 4: Earthquake detailed hypocenter and phase data list

  1. Geographic location
  2. DATE = date event occurred, yr/mo/dy (year/month/day)
  3. ORIGIN = event origin time (UCT) in hours, minutes, and seconds
  4. LAT N = latitude north in degrees and minutes
  5. LONG W = longitude west in degrees and minutes
  6. DEPTH = event depth in kilometers
  7. MN = Nuttli Lg phase magnitude with amplitude divided by period
  8. MC = signal duration (coda) magnitude
    WES: 2.23 Log(FMP) + 0.12Log(Dist) - 2.36 (Rosario, 1979 )
    MIT: 2.21 Log(FMP) - 1.7 (Chaplin et al., 1980)
  9. ML = local magnitude
    WES: calculated from Wood-Anderson seismograms (Ebel, 1982)
    GSC (Geological Survey of Canada): Richter Lg magnitude
  10. GAP = largest azimuthal se paration, in degrees, between stations
  11. RMS = root mean square error of travel time residual in seconds
  12. ERH = standard error of epicenter in kilometers
  13. ERZ = standard error of event depth in kilometers
  14. Q = solution quality of hypocenter
    A = excellent
    B = good
    C = fair
    D = poor

Table Body: earthquake phase data

  1. STN = station name
  2. DIST = epicentral distance in kilometers
  3. AZM = azimuthal angle in degrees measured clockwise between true north and vector pointing from epicenter to station
  4. Description of onset of phase arrival
    I = impulsive
    E = emergent
  5. R = phase
    P = first P arrival
    S = first S arrival
  6. M = first motion direction of phase arr ival
    U = up or compression
    D = down or dilatation
  7. K = weight of arrival
    0 = full weight (1.0)
    1 = 0.75 weight
    2 = 0.50 weight
    3 = 0.25 weight
    4 = no weight (0.0)
  8. HRMN = hour and minute of phase arriva l
  9. SEC = second of phase arrival
  10. TCAL = calculated travel time of phase in seconds
  11. RES = travel time residual (error) of phase arrival
  12. WT = weight of phase used in hypocentral solution
  13. AMX = peak-to-peak ground motion, in millimicrons, of the maximum envelope amplitude of vertical-component signal, corrected for system response
  14. PRX = period in seconds of the signal from which amplitude was measured
  15. XMAG = Nuttli magnitude recorded at station
  16. FMP = sign al duration (coda), in seconds, measured from first P arrival
  17. FMAG = coda magnitude recorded at station

Table 5: Microearthquakes and other non-locatable events

  1. Date = date event occurred, Yr (year)/Mo (month)/Dy (day)
  2. Sta = neares t station recording event
  3. Arrival Time = phase arrival time, Hr (hour):Mn (minute):Sec (second)

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TABLE 1



WESTON OBSERVATORY PERSONNEL

Name Position voice phone email address
John E. Ebel Observatory Director, Seismologist, Principal Investigator 617-552-8319 ebel@bc.edu
Alan Kafka Research Seismologist 617-552-8300 kafka@bc.edu
Anastasia Macherides Moulis Seismologist, Analyst 617-552-8325 macherid@bc.edu
Dina Smith Associate Director of Operations, Seismologist 617-552-8335 dina.smith.1@bc.edu
Michael Hagerty New England Seismic Network Manager, Seismologist 617-552-8337 hagertmb@bc.edu
Weston Observatory
617-552-8300

617-552-8388 (FAX)



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TABLE 2




     

SEISMIC STATIONS OF THE NEW ENGLAND SEISMIC NETWORK

WES43.7050-72.3525Belchertown, MATroy, NYWESUMMWES42.3850WESYLEPQI46.6710
Code Lat Long Elev (m) Location Operator
BCX * 42.3350 -71.1705 61.0 Chestnut Hill, MA WES
BRYW 41.9178 -71.5388 380.0 Smithfield, RI WES
FFD 43.4702 -71.6533 131.0 Franklin Falls Dam, NH
HNH -72.2860 180.0 Hanover, NH WES
QUA2 42.2789 168.0 WES
TRY 42.7311 -73.6669 131.0
44.7100 -67.4583 35.0 Machias, ME WES
VT1 44.3317 -72.7536 410.0 Waterbury, VT WES
-71.3220 60.0 Weston, MA WES
WVL 44.5648 -69.6575 85.0 Waterville, ME
41.3100 -72.9269 10.0 New Haven, CT WES
-68.0168 175.0 Presque Isle, ME WES

* = not in operation during this quarter


     

STRONG MOTION STATIONS OF THE NEW ENGLAND SEISMIC NETWORK

SM2-73.10Newport, RISM4-71.30WESSM742.39-71.54WES
Code Lat Long Location Operator
SM1 44.90 -67.25 Dennysville, ME WES
44.49 Essex Junction, VT WES
SM3 41.45 -71.33 WES
42.38 -71.32 Weston, MA WES
SM5 42.66 Lowell, MA
SM6 42.30 -71.34 Natick, MA WES
Huds on, MA WES
SM8 44.48 -69.61 North Vassalboro, ME


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TABLE 3




     

NEW ENGLAND AND ADJACENT REGIONS

July-September, 2005


Date

M/D/Y
Time (UTC)

Hr:Mn:Sec
Lat Long Depth

(km)
Mag Int Location
07/04/2005 11:47:15:01 46.19 -76.82 16.66 2.6
PQ, 72.5 KM WSW OF MANIWAKI
08/14/2005 05:56:56.28 44.48 -69.58 11.26 1.9
ME, 6 KM NE OF AUGUSTA
08/19/2005 15:29:36.69 43.45 -71.54 07.79 1.7
NH, 9 KM E OF FRANKLIN
08/23/2005 00:00:56.41 43.03 -71.85 12.82 1.4
NH, 30.6 KM S OF CONCORD
09/06/2005 02:58:46.05 45.69 -75.40 05.00 2.3
PQ, 10.5 KM N OF BUCKINGHAM
09/06/2005 14:10:52.18 46.30 -75.29 11.80 2.9
PQ, 30 KM SE OF MONT-LAURIER
09/25/2005 03:08:58.45 45.04 -67.28 00.38 3.5
ME, 6.4 KM NW OF AYERS
* indicates Mc rather than Mn.

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TABLE 4

EARTHQUAKE PHASE DATA LIST
NEW ENGLAND AND ADJACENT REGIONS
July-September, 2004

C5704A.XX
NORTHERN NY AND ADIRONDACKS
05JUL04 CANADA, QC, 72.5KM (45MI) WSW OF MANIWAKI
  DATE     ORIGIN    LAT N    LONG W   DEPTH   MN  MC  ML GAP   RMS  ERH  ERZ Q
  50704 1147 15.01 46-11.67  76-49.20  16.66  2.6  .0     118   .47  1.2  2.9 C
  STN  DIST AZM  RMK HRMN   SEC   TOBS   TCAL   RES   WT AMX PRX XMAG FMP FMAG
  TRQ 174.8  89 EP 0 1147 41.67  26.66  26.35   .31 3.13
                ES 3 1147 60.13  45.12  46.90 -1.78  .39
 VLDQ 218.6 347 EP 0 1147 46.97  31.96  31.75   .19 2.76
                ES 0 1147 71.62  56.61  56.51   .06 2.76
 KGNO 220.1 173 EP 3 1147 48.92  33.91  31.94  1.95  .20
                ES 0 1147 71.97  56.96  56.86   .08 2.75
 SADO 240.9 229 EP 2 1147 48.87  33.86  34.50  -.68 1.26
                ES 3 1147 78.60  63.59  61.41  2.10  .12
  MNT 260.2 107 EP 0 1147 51.92  36.91  36.89   .00 2.41
                ES 0 1147 80.77  65.76  65.66   .06 2.41
 WLVO 281.3 206 EP 4 1147 57.09  42.08  39.49  2.58  .00
                ES 4 1147 87.68  72.67  70.29  2.36  .00
 PKRO 304.7 216 EP 0 1147 57.60  42.59  42.39   .17 2.04
                ES 4 1147 28.56  13.55  75.45-61.95  .00
  DPQ 315.6  80 EP 0 1147 58.33  43.32  43.72  -.41 1.93
                ES 3 1147 90.29  75.28  77.83 -2.55  .02
  MOQ 368.3 105 EP 0 1148  5.66  50.65  50.23   .28 1.51
                ES 4 1148 47.15  92.14  89.41  2.48  .00
 STCO 380.6 209 EP 4 1148 11.28  56.27  51.75  4.50  .00
                ES 3 1148 45.94  90.93  92.12 -1.22  .31
 ACTO 384.9 222 EP 0 1148  7.38  52.37  52.29   .02 1.37
                ES 4 1148 46.29  91.28  93.07 -1.90  .00
  EFO 397.5 210 EP 3 1148  7.61  52.60  53.84 -1.28  .27
 ELGO 400.0 226 EP 2 1148  8.63  53.62  54.15  -.59  .62
                ES 4 1148 49.97  94.96  96.38 -1.53  .00
 TYNO 421.1 215 EP 4 1148 14.16  59.15  56.75  2.37  .00
                ES 4 1148 52.92  97.91 101.02 -3.16  .00
 BRCO 421.8 239 ES 4 1148 54.31  99.30 101.18 -1.97  .00
  QCQ 430.2  81 ES 2 1148 58.77 103.76 103.02   .70  .48
 HGVO 445.1 216 EP 3 1148 13.94  58.93  59.71  -.82  .21
                ES 3 1148 60.55 105.54 106.28  -.82  .21
 BINY 449.6 171 EP 0 1148 15.67  60.66  60.27   .31  .84
                ES 4 1148 58.10 103.09 107.28 -4.34  .00
  HNH 452.6 128 EP 4 1148 23.40  68.39  60.64  7.72  .00  23 .60  2.4
                ES 4 1148 77.30 122.29 107.93 14.30  .00
  TRY 459.3 147 ES 4 1149 80.10 185.09 109.42 75.58  .00  44 .80  2.6
  DAQ 466.9  65 EP 4 1148 15.26  60.25  62.41 -2.32  .00
                ES 0 1148 66.48 111.47 111.09   .09  .69
  FFD 508.7 127 EPD4 1148 31.30  76.29  67.57  8.70  .00
                ES 4 1148 86.80 131.79 120.27 11.48  .00
  A54 508.9  74 EP 3 1148 20.69  65.68  67.59 -1.97  .03
                ES 3 1148 73.65 118.64 120.31 -1.78  .04
  LMQ 517.2  73 EP 3 1148 22.07  67.06  68.62 -1.63  .04
                ES 3 1148 75.20 120.19 122.14 -2.07  .02
  A11 519.7  77 ES 2 1148 76.37 121.36 122.69 -1.35  .10
  A16 538.8  75 EP 1 1148 26.77  71.76  71.29   .47  .07
                ES 4 1148 78.19 123.18 126.89 -3.72  .00
  A61 539.2  72 EP 3 1148 24.28  69.27  71.33 -2.07  .00
                ES 4 1148 78.75 123.74 126.96 -3.24  .00
  A64 557.4  71 EP 3 1148 29.70  74.69  73.58  1.09  .00
                ES 3 1148 84.06 129.05 130.97 -1.96  .00
 QUA2 562.9 141 ES 4 1149 47.50 152.49 132.17 20.26  .00  19 .80  2.4
  A21 568.6  73 EP 3 1148 27.95  72.94  74.97 -2.04  .00
                ES 4 1148 83.79 128.78 133.44 -4.69  .00
  HRV 586.2 134 ES 4 1149 53.70 158.69 137.30 21.33  .00
  WVL 589.8 108 ES 4 1149 60.58 165.57 138.10 27.45  .00  18 .29  2.8
  WES 609.7 134 ES 4 1149 62.30 167.29 142.46 24.81  .00  12 .80  2.3
  YLE 626.7 150 ES 4 1149 71.80 176.79 146.19 30.59  .00  55 .70  3.0
  GGN 787.9  99 EP 4 1148 54.72  99.71 102.03 -2.33  .00
C5814A.XX
SOUTHEAST MAINE CRUSTAL MODEL
05AUG14 ME, 6KM (3.7MI) NE OF AUGUSTA
  DATE     ORIGIN    LAT N    LONG W   DEPTH   MN  MC  ML GAP   RMS  ERH  ERZ Q
  50814  556 56.28 44-28.60  69-35.16  11.26  1.9  .0     155   .17 14.1  7.9 D
  STN  DIST AZM  RMK HRMN   SEC   TOBS   TCAL   RES   WT AMX PRX XMAG FMP FMAG
  WVL   8.7 313 IPC0  556 58.54   2.26   2.32  -.07 1.69  99 .08  1.2
                ESC0  556 60.43   4.15   4.13   .01 1.69
  UMM 170.9  81 EP 1  557 22.75  26.47  26.24   .22  .89  10 .11  1.7
                ES 1  557 42.86  46.58  46.71  -.14  .89
  FFD 200.0 236 EPD1  557 26.09  29.81  29.83  -.04  .82  71 .15  2.6
                ESD4  557 46.66  50.38  53.10 -2.75  .00
  HNH 232.5 248 EPD2  557 31.98  35.70  33.85  1.83  .03   5 .12  1.7
                ESD4  557 58.05  61.77  60.25  1.47  .00
  HRV 270.9 216 EPD4  557 37.18  40.90  38.58  2.30  .00
                ESD4  557 66.70  70.42  68.67  1.70  .00
  WES 271.6 211 EPD4  557 32.34  36.06  38.68 -2.62  .00   3 .10  1.8
                ESD4  557 60.21  63.93  68.84 -4.93  .00
  PQI 272.9  27 EP 4  557 36.05  39.77  38.83   .91  .00
                ES 4  557 71.03  74.75  69.12  5.58  .00
 QUA2 331.4 223 EPD4  557 35.54  39.26  46.06 -6.82  .00   2 .08  2.0
                ESD4  557 76.11  79.83  81.98 -2.20  .00
C5819A.XX
HUGHES AND LUETGERT NH
05AUG19 NH, 9KM (5.6MI) E OF FRANKLIN, 26KM (16MI) N OF CONCORD
  DATE     ORIGIN    LAT N    LONG W   DEPTH   MN  MC  ML GAP   RMS  ERH  ERZ Q
  50819 1529 36.67 43-27.01  71-32.36   7.79  1.7  .0     191   .26  1.4  1.1 B
  STN  DIST AZM  RMK HRMN   SEC   TOBS   TCAL   RES   WT AMX PRX XMAG FMP FMAG
  FFD   9.5 284 EPD0 1529 38.81   2.14   2.08   .04 1.50
                ES 0 1529 40.26   3.59   3.70  -.15 1.50
  HNH  66.6 295 EPD1 1529 48.25  11.58  11.16   .39  .98  17 .09  1.4
                ES 0 1529 56.58  19.91  19.86  -.01 1.34
 LBNH  93.1 340 EPD0 1529 52.25  15.58  15.47   .04 1.27
                ES 1 1529 64.03  27.36  27.55  -.30  .94
  HRV 104.9 181 EPD3 1529 55.52  18.85  17.34  1.47  .01
                ES 1 1529 67.02  30.35  30.87  -.58  .86
  WES 119.7 171 EPD0 1529 56.36  19.69  19.64   .03 1.19  67 .19  2.2
                ES 1 1529 71.94  35.27  34.96   .29  .89
 QUA2 146.1 207 EPD2 1529 60.99  24.32  23.74   .55  .53  15 .32  1.6
                ES 3 1529 77.35  40.68  42.25 -1.63  .00
  TRY 190.7 245 ES 0 1529 90.04  53.37  53.37  -.09 1.00  12 .17  1.8
  NCB 224.0 285 EP 4 1529 72.40  35.73  34.09  1.54  .00
                ES 4 1529 94.00  57.33  60.68 -3.53  .00
C5823A.XX
HUGHES AND LUETGERT NH
05AUG23 NH, 30.6KM (19MI) SW OF CONCORD
  DATE     ORIGIN    LAT N    LONG W   DEPTH   MN  MC  ML GAP   RMS  ERH  ERZ Q
  50823  0 0 56.41 43- 1.71  71-50.81  12.82  1.4  .0     131   .45  1.9  3.2 C
  STN  DIST AZM  RMK HRMN   SEC   TOBS   TCAL   RES   WT AMX PRX XMAG FMP FMAG
  FFD  51.5  18 EP 0  0 1  5.36   8.95   8.81   .12 1.72
                ES 2  0 1 11.41  15.00  15.68  -.72  .80
  HNH  83.2 335 EP 3  0 1 11.62  15.21  13.73  1.45  .20   5 .09  1.0
                ES 0  0 1 21.10  24.69  24.45   .19 1.61
  WES  83.5 149 EPD0  0 1 10.20  13.79  13.78   .00 1.61  20 .09  1.6
                ES 3  0 1 22.70  26.29  24.52  1.75  .08
 QUA2  93.0 206 EP 1  0 1 12.20  15.79  15.26   .50 1.17  24 .12  1.7
                ES 0  0 1 23.23  26.82  27.16  -.40 1.56
  BRY 125.9 168 ES 0  0 1 32.68  36.27  36.25  -.08 1.46   8 .08  1.5
 LBNH 134.8 357 EP 3  0 1 19.54  23.13  21.73  1.34  .22
                ES 3  0 1 34.51  38.10  38.68  -.69  .33
  TRY 152.3 257 ES 1  0 1 39.27  42.86  43.52  -.75  .94   3 .10  1.3
  NCB 218.9 299 EP 0  0 1 29.56  33.15  32.93   .12 1.14
                ES 0  0 1 55.46  59.05  58.61   .26 1.14
 BINY 352.1 255 ES 4  0 1 57.70  61.29  87.88-26.73  .00
C5906A.XX
NORTHERN NY AND ADIRONDACKS
05SEP06 CANADA, 10.5KM (6.5MI) N OF BUCKINGHAM, QC
  DATE     ORIGIN    LAT N    LONG W   DEPTH   MN  MC  ML GAP   RMS  ERH  ERZ Q
  50906  258 46.05 45-41.53  75-23.77   5.00  2.3  .0      92   .47  2.0  2.9 C
  STN  DIST AZM  RMK HRMN   SEC   TOBS   TCAL   RES   WT AMX PRX XMAG FMP FMAG
 CRLO 158.7 284 EP 1  259 10.85  24.80  24.29   .48 1.50
                ES 0  259 29.13  43.08  43.24  -.21 2.07
 KGNO 184.4 208 EP 0  259 14.12  28.07  28.18  -.12 1.93
                ES 3  259 35.27  49.22  50.17  -.96  .39
  NCB 212.6 154 EP 0  259 18.28  32.23  32.04   .10 1.78
                ES 1  259 42.66  56.61  57.02  -.59 1.29
  DPQ 230.1  61 EP 1  259 19.63  33.58  34.19  -.61 1.21
                ES 4  259 43.35  57.30  60.86 -3.56  .00
  MIV 232.5 141 EP 1  259 21.03  34.98  34.49   .44 1.23
                ES 1  259 48.05  62.00  61.40   .51 1.22
  MOQ 249.2 100 EP 0  259 22.56  36.51  36.55  -.18 1.59
                ES 4  259 47.23  61.18  65.07 -4.13  .00
 ACCN 291.0 152 EP 2  259 28.60  42.55  41.72   .78  .61
                ES 1  259 60.96  74.91  74.26   .55  .99
  EEO 302.8 290 EP 3  259 28.25  42.20  43.17 -1.04  .25
 VLDQ 311.4 330 EP 2  259 30.97  44.92  44.24   .67  .58
                ES 1  259 65.27  79.22  78.74   .45  .92
 SADO 311.7 251 EP 1  259 29.75  43.70  44.27  -.60  .90
                ES 4  259 62.07  76.02  78.79 -2.84  .00
  HNH 331.0 132 ES 4  259 74.72  88.67  83.04  5.58  .00   7 .14  2.2
  TRY 356.9 157 ES 4  259 77.76  91.71  88.73  2.89  .00  14 .26  2.2
  FFD 386.4 130 EP 2  259 38.82  52.77  53.49  -.74  .40
 BINY 391.7 187 EP 0  259 40.23  54.18  54.14  -.04  .84
                ES 3  259 81.03  94.98  96.37 -1.53  .04
  DAQ 405.4  51 EP 4  259 39.17  53.12  55.84 -2.88  .00
                ES 4  259 80.16  94.11  99.40 -5.57  .00
 QUA2 451.0 147 EP 2  259 48.20  62.15  61.47   .65  .25  13 .28  2.4
C5906B.XX
NORTHERN NY AND ADIRONDACKS
05SEP06 CANADA, 30KM (18.6MI) SE OF MONT-LAURIER, QC
  DATE     ORIGIN    LAT N    LONG W   DEPTH   MN  MC  ML GAP   RMS  ERH  ERZ Q
  50906 1410 52.18 46-17.92  75-17.43  11.80  2.9  .0     111   .46   .9  1.2 C
  STN  DIST AZM  RMK HRMN   SEC   TOBS   TCAL   RES   WT AMX PRX XMAG FMP FMAG
  GRQ  55.5 308 EP 1 1411  1.43   9.25   8.76   .43 2.03
                ES 1 1411  8.08  15.90  15.60   .21 2.08
  TRQ  57.3  99 EP 1 1411  1.60   9.42   9.02   .39 2.05
                ES 1 1411  8.51  16.33  16.06   .26 2.07
  GAC  67.8 192 EP 0 1411  2.83  10.65  10.60   .04 2.70
                ES 2 1411 10.51  18.33  18.86  -.55 1.31
  OTT 105.9 198 EP 0 1411  8.64  16.46  16.34   .10 2.49
                ES 2 1411 20.75  28.57  29.09  -.54 1.20
  MNT 156.8 124 EP 0 1411 16.44  24.26  24.04   .19 2.20
                ES 2 1411 34.36  42.18  42.79  -.65 1.05
 CRLO 163.9 260 EP 0 1411 17.24  25.06  25.12  -.09 2.16
                ES 1 1411 36.61  44.43  44.71  -.34 1.60
  DPQ 197.5  78 EP 0 1411 21.56  29.38  29.58  -.20 1.97
                ES 3 1411 45.63  53.45  52.65   .79  .45
  MOQ 260.3 115 EP 3 1411 30.49  38.31  37.33   .84  .36
                ES 2 1411 59.36  67.18  66.44   .48  .79
  NCB 272.0 162 EP 1 1411 31.56  39.38  38.77   .50 1.13
                ES 3 1411 62.76  70.58  69.01  1.38  .14
  MIV 283.3 151 EP 0 1411 32.68  40.50  40.17   .28 1.48
                ES 3 1411 65.03  72.85  71.50  1.26  .21
  EEO 292.9 277 EP 0 1411 33.65  41.47  41.35   .05 1.44
                ES 1 1411 66.10  73.92  73.60   .19 1.08
  QCQ 312.5  80 EP 1 1411 36.25  44.07  43.77   .27  .99
                ES 2 1411 68.94  76.76  77.92 -1.20  .45
 SADO 345.7 241 EP 3 1411 39.07  46.89  47.87 -1.03  .23
                ES 4 1411 74.70  82.52  85.21 -2.77  .00
 ACCN 348.4 158 EP 0 1411 40.46  48.28  48.21   .01 1.13
                ES 3 1411 79.30  87.12  85.81  1.20  .18
  DAQ 358.8  59 EP 2 1411 40.81  48.63  49.49 -1.02  .43
                ES 1 1411 80.48  88.30  88.09  -.08  .80
  HNH 373.1 141 ES 4 1412 34.77 102.59  91.23 11.30  .00  28 .15  2.8
  A54 393.4  71 EP 2 1411 44.95  52.77  53.75 -1.05  .34
                ES 4 1411 85.57  93.39  95.68 -2.40  .00
  A11 402.7  75 EP 3 1411 45.94  53.76  54.91 -1.16  .14
                ES 4 1411 87.17  94.99  97.74 -2.77  .00
  LMQ 403.0  70 EP 2 1411 46.17  53.99  54.94 -1.02  .33
                ES 4 1411 87.70  95.52  97.80 -2.40  .00
  TRY 417.0 162 EP 4 1411 55.38  63.20  56.67  6.47  .00  31 .22  2.8
  A16 422.9  72 EP 1 1411 48.78  56.60  57.40  -.80  .49
                ES 3 1411 92.16  99.98 102.17 -2.19  .00
  A61 424.8  69 EP 1 1411 49.03  56.85  57.64  -.80  .48
                ES 4 1411 62.41  70.23 102.59-32.38  .00
  A64 443.7  67 EP 2 1411 51.24  59.06  59.97  -.94  .26
                ES 3 1411 97.15 104.97 106.76 -1.82  .01
  A21 453.7  70 EP 1 1411 52.58  60.40  61.21  -.82  .37
                ES 4 1411 98.79 106.61 108.95 -2.36  .00
 BINY 459.6 187 ES 4 1412 55.30 123.12 110.23 12.74  .00
 ACTO 480.6 232 EP 2 1411 55.96  63.78  64.52  -.81  .18
  WVL 482.2 114 EP 4 1412 13.30  81.12  64.73 16.38  .00  19 .22  2.8
                ES 4 1412 63.22 131.04 115.21 15.81  .00
 ELGO 499.7 234 EP 1 1411 59.64  67.46  66.88   .52  .20
 QUA2 504.5 152 EP 4 1412  1.89  69.71  67.47  2.20  .00  30 .32  2.8
                ES 4 1412 63.60 131.42 120.10 11.26  .00
  HRV 515.7 145 ES 4 1412 69.90 137.72 122.58 15.09  .00
  WES 538.0 144 ES 4 1412 76.70 144.52 127.47 17.03  .00  15 .25  2.7
  PQI 559.9  86 ES 4 1412 87.96 155.78 132.28 23.44  .00  76 .22  3.5
  CNQ 635.5  58 EP 4 1412 13.57  81.39  83.64 -2.29  .00
                ES 4 1412 76.95 144.77 148.89 -4.17  .00
  MNQ 674.2  46 EP 1 1412 19.78  87.60  88.42  -.92  .00
                ES 4 1412 85.44 153.26 157.39 -4.29  .00
  GSQ 680.5  65 EP 3 1412 20.09  87.91  89.20 -1.30  .00
                ES 4 1412 86.10 153.92 158.77 -4.88  .00
  ICQ 698.5  59 EP 4 1412 21.27  89.09  91.43 -2.35  .00
                ES 4 1412 89.10 156.92 162.75 -5.85  .00
  SMQ 772.2  56 EP 3 1412 30.88  98.70 100.53 -1.89  .00
  LMN 812.3  94 EP 3 1412 36.40 104.22 105.47 -1.32  .00
C5925A.XX
SOUTHEAST MAINE CRUSTAL MODEL
05SEP25 ME, 6.5KM (4MI) NW OF AYERS
  DATE     ORIGIN    LAT N    LONG W   DEPTH   MN  MC  ML GAP   RMS  ERH  ERZ Q
  50925  3 8 57.83 45- 2.18  67-16.88    .38  3.5 3.4     102   .37   .9  1.6 C
  STN  DIST AZM  RMK HRMN   SEC   TOBS   TCAL   RES   WT AMX PRX XMAG FMP FMAG
  GGN  37.3  76  P 0  3 9  3.97   6.14   6.30  -.17 3.16
                 S 2  3 9  8.22  10.39  11.21  -.84 1.38
  UMM  38.9 201 IPD1  3 9  4.72   6.89   6.57   .31 2.33              310  3.4
                ES 0  3 9  9.38  11.55  11.69  -.16 3.15
  PQI 190.4 343 EPC0  3 9 27.47  29.64  29.79  -.19 2.21 398 .08  3.5 273  3.4
                ES 0  3 9 51.16  53.33  53.03   .24 2.19
  WVL 196.9 253 IPD0  3 9 28.47  30.64  30.60   .03 2.17 514 .26  3.3 272  3.4
                ES 3  3 9 50.51  52.68  54.46 -1.80  .01
  LMN 214.0  65 EP 1  3 9 31.05  33.22  32.70   .46 1.50
  HAL 294.7  99 EP 3  3 9 41.60  43.77  42.67  1.09  .22
                ES 1  3 9 74.19  76.36  75.95   .39 1.15
  A11 333.2 317 EP 1  3 9 44.93  47.10  47.41  -.32  .99
                ES 0  3 9 82.07  84.24  84.39  -.17 1.33
  A16 342.4 322 EP 0  3 9 46.66  48.83  48.56   .27 1.26
                ES 3  3 9 82.74  84.91  86.43 -1.52  .05
  LMQ 364.7 320 EP 0  3 9 49.22  51.39  51.31   .01 1.14
                ES 4  3 9 87.20  89.37  91.33 -2.08  .00
  QCQ 365.9 302 EP 1  3 9 49.88  52.05  51.45   .58  .81
                ES 2  3 9 88.81  90.98  91.58  -.64  .54
 LBNH 379.3 257 EPD0  3 9 51.27  53.44  53.10   .28 1.04
                ES 1  3 9 91.65  93.82  94.52  -.81  .71
  FFD 389.9 243 EP 2  3 9 53.02  55.19  54.42   .75  .43
                ES 1  3 9 94.10  96.27  96.86  -.63  .71
  MOQ 391.9 274 EP 1  3 9 52.98  55.15  54.67   .34  .72
                ES 4  3 9 92.94  95.11  97.31 -2.45  .00
  HNH 425.2 250 EP 0  3 9 56.80  58.97  58.78   .16  .77 238 .40  3.5
  GSQ 431.3   2 EP 1  3 9 57.93  60.10  59.53   .56  .52
  WES 439.2 228 EP 0  3 9 58.26  60.43  60.51  -.09  .68 157 .32  3.4
  VT1 440.8 260 EP 4  310  7.00  69.17  60.70  8.45  .00
                ES 4  310 63.96 126.13 108.04 18.05  .00
  HRV 444.4 231 EPC0  3 9 58.93  61.10  61.15  -.08  .65
  DAQ 445.5 317 EP 1  3 9 58.82  60.99  61.28  -.45  .47
  DPQ 464.0 293 EP 1  310  1.71  63.88  63.57   .31  .39
                ES 3  310 49.15 111.32 113.15 -1.83  .00
  CNQ 478.0 353 EP 1  310  2.77  64.94  65.30  -.39  .33
                ES 4  310 50.08 112.25 116.23 -4.04  .00
  ICQ 498.6   0 EP 0  310  5.70  67.87  67.84   .02  .32
                ES 4  310 55.55 117.72 120.76 -3.06  .00
  MNT 500.1 276 ES 1  310 59.32 121.49 121.08   .37  .23
  MIV 507.5 258 EP 0  310  6.80  68.97  68.94  -.02  .26
 QUA2 510.9 233 EP 1  310  7.55  69.72  69.35   .33  .18 219 .31  3.7
                 S 4  310 79.53 141.70 123.45 18.19  .00
  NCB 564.7 258 EP 1  310 13.58  75.75  76.00  -.35  .00
  TRY 573.4 243 EP 2  310 15.81  77.98  77.08   .85  .00 257 .69  3.6
                ES 4  310 96.60 158.77 137.20 21.48  .00
  SMQ 578.3   4 EP 0  310 15.36  77.53  77.68  -.21  .00
                ES 4  310 72.45 134.62 138.27 -3.75  .00
  TRQ 582.7 283 EP 0  310 16.16  78.33  78.22   .11  .00
                ES 3  310 75.90 138.07 139.23 -1.16  .00
  MNQ 620.9 350 EP 3  310 19.78  81.95  82.94 -1.08  .00
                ES 4  310 81.27 143.44 147.64 -4.36  .00
  WBO 630.3 270 EP 0  310 21.78  83.95  84.10  -.16  .00
  GAC 646.1 277 EP 0  310 23.98  86.15  86.05   .09  .00
                ES 3  310 89.59 151.76 153.16 -1.42  .00
  GRQ 689.4 285 EP 2  310 28.55  90.72  91.40  -.73  .00
                ES 4  310 97.44 159.61 162.69 -3.17  .00
 BRNJ 766.8 231 EP 4  310 34.53  96.70 100.94 -4.26  .00
 CRLO 797.2 278 EP 1  310 42.19 104.36 104.70  -.37  .00
  EEO 934.0 281 EP 1  310 58.98 121.15 121.59  -.51  .00
  
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TABLE 5

MICROEARTHQUAKES AND OTHER NON-LOCATABLE EVENTS

Date

Yr/Mo/Dy
Sta Arrival Time

Hr:Mn:Sec
None recorded this period.


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NESN Station Map

Figure 1: Map of stations of the New England Seismic Network (NESN) in operation during the period of this report. Also included are other Northeast U.S. and Canadian seismic stations in operation during this period.

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NESN Strong-Motion Station Map

Figure 2: Map of strong-motion stations of the New England Seismic Network (NESN) in operation during the period of this report.

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NESN Quarterly Seismicity Map

Figure 3: Earthquake epicenters located by the NESN during the period of this report.

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NESN Cumulative Seismicity Map

Figure 4: Seismicity for period October, 1975 - September, 2005.

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Acknowledgments

Our map database has been developed in-house using ArcView and in part basemap data provided by ESRI, Inc., USGS GTOPO30 Elevation Data, and TIGER/Line '94, '95, and '97 (US Census Bureau) spatial data.

 

References

Chaplin, M.P., Taylor, S.R., and Toksöz, M.N. (1980), A coda length magnitude scale for New England, Earthquake Notes, 51, 15-22.

Ebel, J.E. (1982), ML measurements for northeastern UnitedStates earthquakes, Bull. Seism. Soc. Am., 72, 1367-1378.

Rosario, M. (1979), A coda duration magnitude scale for the New EnglandSeismic Network, Master's Thesis, Boston College, 82 pp.

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