A STUDY OF NEW ENGLAND SEISMICITY
Quarterly Earthquake Report
July - September, 2008
Weston Observatory
New England Seismic Network
381 Concord Road
Weston, MA 02493
NEW ENGLAND SEISMIC NETWORK (NESN)
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
September, 2008
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 and should not be interpreted as necessarily representing the
official policies, either expressed or implied, of the U.S. Government.
NESN Quarterly Earthquake Report
July - September, 2008
Table of Contents
* Introduction
* Current Network Operation and Status
* Seismicity
* Data Management
* Tables
o Explanation of Tables
o Table 1 Project Personnel
o Table 2 Seismic Stations
o Table 3 Earthquake Hypocenters
o Table 4 Earthquake Phase Data
o Table 5 Microearthquakes and Other Non-locatable Events
* Figures
o NESN Station Map
o NESN Strong-Motion Station Map
o NESN Quarterly Seismicity Map
o NESN Cumulative Seismicity Map
* Acknowledgments
* References
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, 2008. 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 8
earthquakes that occurred within or near the network during this reporting period. Phase
information for these earthquakes is included in this report.
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
broadband 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 threecomponent sensors. Ground motions recorded by these sensors are digitized at 100 sps with 16bit resolution. Additional gain-ranging provides 126 dB dynamic range. These stations are
operated in continuous mode with all waveform data transmitted via the internet to Weston
Observatory for analysis and event archiving.
Seismicity
There were 8 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 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
(LD), 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.
Data Management
Recent event locations are available at http://quake.bc.edu:8000/quakes_recent.htm. Waveform
data are saved in SAC, and SEED formats and are available through the IRIS DMC at:
http://www.iris.edu/dms/dmc/. Earthquake catalogs can be found at:
www.bc.edu/research/westonobservatory/northeast/eqcatalogs/ and http://quake.bc.edu:8000/cgibin/NESN/recent_events.pl. Currently available on the Weston Observatory web page is the full
catalog of northeastern U.S. earthquake activity. For more information consult our web site,
http://www.bc.edu/research/westonobservatory/ or contact:
Anastasia Macherides Moulis
Weston Observatory
381 Concord Road
Weston, MA 02493
Voice: 617-552-8325 / Email: anastasia.macherides.1@bc.edu
Dina Smith
Weston Observatory
381 Concord Road
Weston, MA 02493
Voice: 617-552-8335 / Email: dina.smith.1@bc.edu
Prof. John Ebel
Weston Observatory
381 Concord Road
Weston, MA 02493
Voice: 617-552-8319 / Email: ebel@bc.edu
Explanation of Tables
Table 1: Personnel operating the NESN
Table 2: Seismic and Strong Motion Stations
1. Code = station 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 Hypocenters
1. Date = 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. Mn = Nuttli Magnitude
7. Mc = Coda Magnitude
8. Location = event geographic location
Table 4: Earthquake Phase Data
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)
9. ML = local magnitude
WES: calculated from Wood-Anderson seismograms (Ebel, 1982)
GSC (Geological Survey of Canada): Richter Lg magnitude
10. GAP = largest azimuthal separation, 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 arrival
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 = signal 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 = nearest station recording event
3. Arrival Time = phase arrival time, Hr (hour):Mn (minute):Sec (second)
TABLE 1
WESTON OBSERVATORY PERSONNEL
Name
John E. Ebel
Position
Director, Seismologist,
Principal Investigator
Alan Kafka
Research Seismologist
Anastasia M. Moulis Seismologist, Analyst
Dina Smith
Associate Director of
Operations, Seismologist
Michael Hagerty
NESN Manager,
Seismologist
Weston Observatory 617-552-8388 (FAX)
Phone #
617-552-8319
Email Address
ebel@bc.edu
617-552-8300
617-552-8325
617-552-8335
kafka@bc.edu
macherid@bc.edu
dina.smith.1@bc.edu
617-552-8337
hagertmb@bc.edu
617-552-8300
weston.observatory@bc.edu
TABLE 2
SEISMIC STATIONS OF THE NEW ENGLAND SEISMIC NETWORK
Code
BCX *
BRYW
FFD
HNH
QUA2
TRY
EMMW
VT1 *
WES
WVL
YLE
PQI
Lat
42.3350
41.9199
43.4700
43.7051
42.2790
42.7305
44.7101
44.3317
42.3848
44.5648
41.3165
46.6701
Long
-71.1705
-71.5342
-71.6539
-72.2865
-72.3521
-73.6658
-67.4580
-72.7536
-71.3218
-69.6575
-72.9209
-68.0133
* = not in operation during this quarter
Elev (m)
61.0
107
131
180
168
131
34
125
60
85
10
175
Location
Chestnut Hill, MA
Smithfield, RI
Franklin Falls, NH
Hanover, NH
Belchertown, MA
Troy, NY
Machias, ME
Waterbury, VT
Weston, MA
Waterville, ME
New Haven, CT
Presque Isle, ME
Operator
WES
WES
WES
WES
WES
WES
WES
WES
WES
WES
WES
WES
TABLE 3
EARTHQUAKE HYPOCENTERS
DATE
TIME
LAT
2008/09/04 19:41:45.32 43.63
LONG
-73.52
DEPTH
04.98
Mn Mc
2.3
LOCATION
NY, 19.4KM SSW OF
TICONDEROGA
2008/08/30 21:52:13.62 46.75
-75.47
10.75
3.1 ON, 160.1KM N OF
OTTAWA
2008/08/30 18:56:06.41 44.60
-70.19
02.90
2.7 ME, 3.1KM ENE OF
WILTON
2008/08/23 03:34:07.09 44.46
-69.96
07.88
2.4 ME, 22.0KM NW OF
AUGUSTA
2008/08/15 12:43:19.43 45.78
-65.99
08.29
2.0 2.8 NB, 40.8KM ESE OF
FREDERICTON
2008/08/07 10:01:35.59 45.40
-73.37
14.37
1.6 2.4 PQ, 11.8KM NW OF
ST-JEAN-SURRICHELIEU
2008/07/21 13:04:31.37 44.57
-68.43
04.39
1.6 2.2 ME, 2.3KM NNW OF
ELLSWORTH
2008/07/03 15:55:52.98 45.53
-65.83
10.50
2.8 2.8 NB, 10 KM NE OF
KINGSTON
* indicates magnitude as calculated by Lamont Doherty Earth Observatory
^ indicates magnitude as calculated by Earthquakes Canada (Natural Resources Canada)
TABLE 4
EARTHQUAKE PHASE DATA
Run Hyp2000: Phase File: [84.X] Vel Mod: [12] ===> XX-File: 84.XX
HYPOINVERSE 2000 (10/2006 VERSION) RUN ON Fri Jul 11 14:04:31 2008
CRUST MODEL 1: 12. NORTHWEST MAINE CRUSTAL ST
RUN LABEL=
DATE ORIGIN LAT N LONG W DEPTH MN MC ML GAP RMS ERH ERZ Q
200807031555 52.84 45-35.07 65-52.68 8.73
2.8 2.8 166 0.13 3.2 3.8
NB, 10 KM NE OF KINGSTON, CANADA
NSTA NPHS DMIN N.XMG N.FMG
7 13 88.60 2 7
STN DIST AZM RMK HRMN SEC TOBS TCAL RES WT AMX PRX XMAG FMP FMAG ANG
LMN 88.6 70 IPC0 1556 7.24 14.40 14.38 -0.04 1.82
175 3.0 92
GGN 90.4 236 EPC0 1556 7.64 14.80 14.66 0.13 1.81
140 2.8 92
S 2 1556 18.69 25.85 26.09 -0.26 0.91
EMMW 157.8 233 EPC2 1556 13.96 21.12 25.37 -4.26 0.00 1.2 .11 2.6 102 2.6 91
S 2 1556 36.58 43.74 45.16 -1.44 0.01
BATG 188.6 356 EPC1 1556 22.38 29.54 29.36 0.12 1.07
114 2.7 51
S 2 1556 45.36 52.52 52.26 0.15 0.72
PQI 204.5 307 IPC0 1556 24.06 31.22 31.32 -0.13 1.35 1.1 .33 2.9 63 2.3 51
S 2 1556 50.80 57.96 55.75 2.16 0.00
PKME 269.6 264 IPC0 1556 32.26 39.42 39.36 0.04 1.00
184 3.2 51
S 2 1557 1.40 68.56 70.06 -1.54 0.00
LMQ 405.1 305 IPC0 1556 48.40 55.56 56.08 -0.59 0.31
158 3.2 51
S 2 1557 30.62 97.78 99.82 -2.17 0.00
Run Hyp2000: Phase File: [06.X] Vel Mod: [11] ===> XX-File: 06.XX
HYPOINVERSE 2000 (10/2006 VERSION) RUN ON Wed Jul 23 15:50:55 2008
CRUST MODEL 1: 11. SOUTHEAST MAINE CRUSTAL MO
RUN LABEL=
DATE ORIGIN LAT N LONG W DEPTH MN MC ML GAP RMS ERH ERZ Q
200807211304 31.37 44-34.28 68-25.61 4.39
1.6 2.2 190 0.37 1.4 3.6
ME, 2.3Km (1.43MI) NNW OF ELLSWORTH
NSTA NPHS DMIN N.XMG N.FMG
7 14 78.40 2 4
STN DIST AZM RMK HRMN SEC TOBS TCAL RES WT AMX PRX XMAG FMP FMAG ANG
EMMW 78.4 78 EPC0 1304 43.77 12.40 12.70 -0.31 1.67 0.6 .10 1.8
72
S 2 1304 53.60 22.23 22.61 -0.39 0.84
WVL 98.6 268 EPC0 1304 47.16 15.79 15.91 -0.13 1.62 0.2 .10 1.3 36 1.7 72
S 2 1304 59.66 28.29 28.32 -0.05 0.81
PKME 102.9 319 IPC0 1304 48.37 17.00 16.59 0.39 1.61
121 2.7 72
S 1 1305 0.27 28.90 29.53 -0.67 1.13
GGN 140.6 63 IPC0 1304 54.48 23.11 22.58 0.52 1.49
37 1.9 72
S 1 1305 11.39 40.02 40.19 -0.19 1.12
PQI 235.5 7 PC3 1305 7.05 35.68 34.89 0.76 0.21
47
S 1 1305 33.57 62.20 62.10 0.04 0.81
LBNH 281.2 264 EPC2 1305 14.22 42.85 40.54 2.25 0.00
88 2.7 47
S 2 1305 45.84 74.47 72.16 2.20 0.00
LMN 318.1 62 EPC1 1305 16.84 45.47 45.10 0.31 0.50
S 2 1305 50.93 79.56 80.28 -0.82 0.19
47
Run Hyp2000: Phase File: [23.X] Vel Mod: [6] ===> XX-File: 23.XX
HYPOINVERSE 2000 (10/2006 VERSION) RUN ON Fri Aug 8 13:18:07 2008
CRUST MODEL 1: 6. NORTHERN NY AND ADIRONDACKS
RUN LABEL=
DATE ORIGIN LAT N LONG W DEPTH MN MC ML GAP RMS ERH ERZ Q
200808071001 35.59 45-23.98 73-22.40 14.37
1.6 2.4 102 0.18 0.8 1.1
PQ, 11.8KM NW OF ST-JEAN-SUR-RICHELIEU
NSTA NPHS DMIN N.XMG N.FMG
9 17 22.60 1 3
STN DIST AZM RMK HRMN SEC TOBS TCAL RES WT AMX PRX XMAG FMP FMAG ANG
MNT 22.6 301 EPC0 1001 39.80 4.21 4.14 0.05 1.40
120
S 0 1001 42.92 7.33 7.37 -0.07 1.40
MOQ 88.2 95 EPC0 1001 49.62 14.03 13.72 0.17 1.32
91 2.4 97
S 0 1002 0.17 24.58 24.42 -0.09 1.32
LONY 128.9 229 S 0 1002 11.11 35.52 35.32 0.08 1.23
94
MDV 156.4 174 EPC0 1001 59.49 23.90 24.00 -0.12 1.15
80 2.4 94
S 0 1002 16.85 41.26 42.72 -1.50 0.00
NCB 172.2 204 EPC0 1002 1.81 26.22 26.22 -0.10 1.09
54
S 0 1002 22.50 46.91 46.67 0.06 1.09
LBNH 172.4 137 EPC0 1002 2.51 26.92 26.24 0.62 0.91
80 2.4 54
S 0 1002 21.54 45.95 46.71 -0.86 0.13
HNH 207.2 154 EPC3 1002 9.19 33.60 30.54 3.03 0.00 0.1 .10 1.6
54
S 0 1002 29.92 54.33 54.36 -0.08 0.97
PKME 320.4 91 EPC0 1002 20.23 44.64 44.52 0.10 0.52
54
S 0 1002 52.89 77.30 79.25 -1.98 0.00
LMQ 334.4 43 EPC0 1002 21.63 46.04 46.24 -0.27 0.47
54
S 0 1002 56.22 80.63 82.31 -1.80 0.00
Run Hyp2000: Phase File: [26.X] Vel Mod: [11] ===> XX-File: 26.XX
HYPOINVERSE 2000 (10/2006 VERSION) RUN ON Fri Aug 15 14:23:59 2008
CRUST MODEL 1: 11. SOUTHEAST MAINE CRUSTAL MO
RUN LABEL=
DATE ORIGIN LAT N LONG W DEPTH MN MC ML GAP RMS ERH ERZ Q
200808151243 19.43 45-46.86 65-59.50 8.29
2.0 2.8 127 0.47 1.1 1.7
NB, 40.8KM ESE OF FREDERICTON
NSTA NPHS DMIN N.XMG N.FMG
12 21 92.50 2 2
STN DIST AZM RMK HRMN SEC TOBS TCAL RES WT AMX PRX XMAG FMP FMAG ANG
LMN 92.5 84 EPC0 1243 34.29 14.86 14.95 -0.15 1.44
126 2.7 92
S 0 1243 45.62 26.19 26.61 -0.53 1.44
GGN 98.3 222 EPC0 1243 35.55 16.12 15.87 0.24 1.43
92
S 0 1243 47.67 28.24 28.25 -0.03 1.43
EMMW 165.6 225 EPC0 1243 45.95 26.52 25.87 0.64 1.23 0.4 .10 2.1
51
S 0 1244 4.81 45.38 46.05 -0.69 1.23
BATG 166.3 359 EPC0 1243 45.65 26.22 25.97 0.19 1.23
139 2.9 51
S 0 1244 5.66 46.23 46.23 -0.10 1.23
PQI 184.7 304 EPC0 1243 48.37 28.94 28.23 0.68 1.16 0.2 .10 1.8
51
S 0 1244 9.25 49.82 50.25 -0.48 1.16
MALG 207.2 88 EPC0 1243 53.45 34.02 31.01 3.01 0.00
51
S 0 1244 15.40 55.97 55.20 0.77 1.07
PKME 264.2 259 EPC0 1243 57.70 38.27 38.05 0.20 0.82
51
S 0 1244 26.19 66.76 67.73 -1.00 0.61
GBN 352.1 95 EPC0 1244 9.27 49.84 48.89 0.94 0.38
51
S 0 1244 49.41 89.98 87.02 2.94 0.00
A21 354.4 309 S 0 1244 46.93 87.50 87.54 -0.06 0.44
51
GSQ 358.4 347 EPC0 1244 9.59 50.16 49.68 0.47 0.42
51
S 0 1244 44.81 85.38 88.43 -3.07 0.00
A16 360.4 303 S 0 1244 47.28 87.85 88.86 -1.01 0.30
51
LMQ 385.7 303 S 0 1244 52.32 92.89 94.41 -1.65 0.00
51
HYPOINVERSE 2000 (10/2006 VERSION) RUN ON Sat Aug 23 23:11:58 2008
CRUST MODEL 1: 12. NORTHWEST MAINE CRUSTAL ST
JE E N
DATE ORIGIN LAT N LONG W DEPTH MN MC ML GAP RMS ERH ERZ Q
200808230334 7.09 44-27.79 69-57.86 7.88
2.4 190 0.12 1.9 3.8
ME, 22.0KM NW OF AUGUSTA
NSTA NPHS DMIN N.XMG N.FMG
5 9 24.80 0 3
STN DIST AZM RMK HRMN SEC TOBS TCAL RES WT AMX PRX XMAG FMP FMAG ANG
WVL 24.8 72 EPC1 334 11.25 4.16 4.28 -0.13 1.29
101
S 2 334 14.98 7.89 7.62 0.25 0.86
PKME 103.7 30 EPC1 334 23.86 16.77 16.77 -0.02 1.19
88 2.4 91
S 3 334 36.46 29.37 29.85 -0.52 0.00
LBNH 158.4 262 EPC1 334 32.68 25.59 25.48 0.05 1.05
82 2.4 90
S 3 334 50.92 43.83 45.35 -1.63 0.00
FFD 174.8 232 S 3 334 57.87 50.78 49.40 1.35 0.00
51
MOQ 204.0 299 EPC2 334 38.67 31.58 31.35 0.09 0.60
65 2.3 51
S 3 335 3.84 56.75 55.80 0.70 0.00
HYPOINVERSE 2000 (10/2006 VERSION) RUN ON Sun Aug 31 00:15:59 2008 JE E N
CRUST MODEL 1: 12. NORTHWEST MAINE CRUSTAL ST
ME, 3.1KM ENE OF WILTON
DATE ORIGIN LAT N LONG W DEPTH MN MC ML GAP RMS ERH ERZ Q
200808301856 6.41 44-35.79 70-11.57 2.90
2.7 156 0.01 2.2 6.4
NSTA NPHS DMIN N.XMG N.FMG
5 9 42.50 0 2
STN DIST AZM RMK HRMN SEC TOBS TCAL RES WT AMX PRX XMAG FMP FMAG ANG
WVL 42.5 99 EPC1 1856 13.54 7.13 7.14 -0.02 1.24
92
S 2 1856 19.14 12.73 12.71 0.00 0.83
PKME 102.8 43 IPC0 1856 23.18 16.77 16.75 0.00 1.54
157 2.9 72
S 2 1856 35.12 28.71 29.81 -1.14 0.00
LBNH 143.6 255 EPC1 1856 29.70 23.29 23.23 0.00 1.06
105 2.6 72
S 3 1856 47.28 40.87 41.35 -0.59 0.00
MOQ 181.1 297 EPC3 1856 35.52 29.11 29.04 -0.07 0.32
S 3 1856 55.47 49.06 51.69 -2.88 0.00
NCB 329.2 260 S 4 1857 39.48 93.07 84.25 8.64 0.00
47
47
HYPOINVERSE 2000 (10/2006 VERSION) RUN ON Sun Aug 31 00:38:57 2008 JE E N
CRUST MODEL 1: 12. NORTHWEST MAINE CRUSTAL ST
ON, 160.1KM N OF OTTAWA
DATE ORIGIN LAT N LONG W DEPTH MN MC ML GAP RMS ERH ERZ Q
200808302152 13.62 46-44.99 75-28.09 10.75
3.1 318 0.23 15.0 17.4
NSTA NPHS DMIN N.XMG N.FMG
5 8 246.60 0 3
STN DIST AZM RMK HRMN SEC TOBS TCAL RES WT AMX PRX XMAG FMP FMAG ANG
LONY 246.6 163 EPC1 2152 50.01 36.39 36.32 0.00 1.75
189 3.2 51
S 2 2153 18.24 64.62 64.65 -0.15 1.17
MOQ 295.8 121 EPC1 2152 55.99 42.37 42.39 -0.16 1.33
185 3.2 51
S 2 2153 29.53 75.91 75.45 0.21 0.89
NCB 323.6 162 EPC2 2153 0.10 46.48 45.83 0.55 0.73
127 2.9 51
S 1 2153 38.21 84.59 81.58 2.83 0.13
LBNH 393.1 133 S 1 2153 58.39 104.77 96.83 7.83 0.00
51
PKME 506.4 106 S 1 2154 28.79 135.17 121.75 13.38 0.00
51
Run Hyp2000: Phase File: [35.X] Vel Mod: [6] ===> XX-File: 35.XX
HYPOINVERSE 2000 (10/2006 VERSION) RUN ON Wed Sep 10 13:42:44 2008
CRUST MODEL 1: 6. NORTHERN NY AND ADIRONDACKS
RUN LABEL=
DATE ORIGIN LAT N LONG W DEPTH MN MC ML GAP RMS ERH ERZ Q
200809041941 45.32 43-37.90 73-31.05 4.98
2.3 244 0.07 1.9 13.3
NY, 19.4KM SSW OF TICONDEROGA
NSTA NPHS DMIN N.XMG N.FMG
4 8 49.00 0 4
STN DIST AZM RMK HRMN SEC TOBS TCAL RES WT AMX PRX XMAG FMP FMAG ANG
MDV 49.0 33 EPC1 1941 52.88 7.56 7.67 -0.13 0.95
78 2.2 91
S 2 1941 59.09 13.77 13.65 0.08 0.63
NCB 68.3 305 EPC0 1941 56.01 10.69 10.61 -0.02 1.24
82 2.3 90
S 3 1942 5.07 19.75 18.89 0.69 0.00
LONY 139.0 323 EPC0 1942 6.75 21.43 21.31 0.05 1.10
78 2.4 90
S 3 1942 24.23 38.91 37.93 0.85 0.00
LBNH 144.6 61 EPC0 1942 7.59 22.27 22.15 0.06 1.08
73 2.3 90
S 2 1942 25.34 40.02 39.43 0.49 0.00
TABLE 5
MICROEARTHQUAKES AND OTHER NON-LOCATABLE EVENTS
Date
yr/mo/day
Station
None recorded this period.
Arrival Time
hr:min:sec
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.
NESN Strong-Motion Station Map
Figure 2: Map of strong-motion stations of the New England Seismic Network (NESN).
NESN Quarterly Seismicity Map
Figure 3: Earthquake epicenters located by the NESN during the period of this report.
NESN Cumulative Seismicity Map
Figure 4: Seismicity for period October, 1975 - September, 2008.
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
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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.