M2.4 - 6km SE of Boothbay Harbor, Maine 2013-01-14 18:19:23 UTC
Summary
Location and Magnitude contributed by: USGS, NEIC, Golden, Colorado (and predecessors)
General
20 km
20 mi
Powered by Leaflet
43.810°N, 69.578°W
Depth: 5.0km (3.1mi)
Depth: 5.0km (3.1mi)
Event Time
- 2013-01-14 18:19:23 UTC
- 2013-01-14 13:19:23 UTC-05:00 at epicenter
- 2013-01-14 12:19:23 UTC-06:00 system time
Location
43.810°N 69.578°W depth=5.0km (3.1mi)Nearby Cities
- 6km (4mi) SE of Boothbay Harbor, Maine
- 33km (21mi) ESE of Brunswick, Maine
- 56km (35mi) ENE of Portland, Maine
- 56km (35mi) ENE of South Portland, Maine
- 57km (35mi) SSE of Augusta, Maine
Tectonic Summary
Earthquakes in New England
People in New England, and in its geological extension southward through Long Island, have felt small earthquakes and suffered damage from infrequent larger ones since colonial times. Moderately damaging earthquakes strike somewhere in the region every few decades, and smaller earthquakes are felt roughly twice a year. The Boston area was damaged three times within 28 years in the middle 1700's, and New York City was damaged in 1737 and 1884. The largest known New England earthquakes occurred in 1638 (magnitude 6.5) in Vermont or New Hampshire, and in 1755 (magnitude 5.8) offshore from Cape Ann northeast of Boston. The Cape Ann earthquake caused severe damage to the Boston waterfront. The most recent New England earthquake to cause moderate damage occurred in 1940 (magnitude 5.6) in central New Hampshire.Earthquakes in the central and eastern U.S., although less frequent than in the western U.S., are typically felt over a much broader region. East of the Rockies, an earthquake can be felt over an area as much as ten times larger than a similar magnitude earthquake on the west coast. A magnitude 4.0 eastern U.S. earthquake typically can be felt at many places as far as 100 km (60 mi) from where it occurred, and it infrequently causes damage near its source. A magnitude 5.5 eastern U.S. earthquake usually can be felt as far as 500 km (300 mi) from where it occurred, and sometimes causes damage as far away as 40 km (25 mi).
Faults
Earthquakes everywhere occur on faults within bedrock, usually miles deep, although some New England earthquakes occur at shallower depths. Most of New England's and Long Island's bedrock was assembled as continents collided to form a supercontinent 500-300 million years ago, raising the northern Appalachian Mountains. The rest of the bedrock formed when the supercontinent rifted apart 200 million years ago to form what are now the northeastern U.S., the Atlantic Ocean, and Europe.At well-studied plate boundaries like the San Andreas fault system in California, often scientists can determine the name of the specific fault that is responsible for an earthquake. In contrast, east of the Rocky Mountains this is rarely the case. New England and Long Island are far from the nearest plate boundaries, which are in the center of the Atlantic Ocean and in the Caribbean Sea. New England is laced with known faults but numerous smaller or deeply buried faults remain undetected. Even the known faults are poorly located at the depths of most earthquakes. Accordingly, few, if any, earthquakes in New England can be linked to named faults. It is difficult to determine if a known fault is still active and could slip and cause an earthquake. As in most other areas east of the Rockies, the best guide to earthquake hazards in New England and Long Island is the earthquakes themselves.
Additional Commentary
Felt at Wiscasset.
Did You Feel It? Tell Us!
Contributed by USGS National Earthquake Information Center
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Did you feel this earthquake? Tell Us!
Intensity Maps
Graphs
Responses
Historic Seismicity
Current Year
Since 1990
Since 1900
Technical
Location and Magnitude contributed by: USGS, NEIC, Golden, Colorado (and predecessors)
Summary
Preferred Location Parameters
Parameter | Value | Uncertainty |
---|---|---|
Magnitude | 2.4 mb_Lg | ± 0.15 |
Location | 43.810°N, 69.578°W | ± 11.8 km |
Depth | 5.0 km | ± 3.1 km |
Number of Stations Used | 18 | |
Number of Phases Used | 25 | |
Minimum Distance | 84.6 km (0.76°) | |
Travel Time Residual | 1.18 sec | |
Azimuthal Gap | 159° | |
Review Status | REVIEWED | |
Event ID | usb000enwr |
Scientific and Technical Links
Contributed Solutions
Downloads
All Downloads
Product | Title | Links | ID |
---|---|---|---|
dyfi (US) | DYFI City Map | usb000enwr | |
dyfi (US) | DYFI Geocoded Map | usb000enwr | |
dyfi (US) | Intensity vs. Distance Plot | usb000enwr | |
dyfi (US) | Responses vs. Time Plot | usb000enwr | |
dyfi (US) | Intensity Summary | usb000enwr | |
dyfi (US) | Intensity Summary (Geocoded) | usb000enwr | |
dyfi (US) | DYFI Combined Geospatial Data | usb000enwr | |
historical-moment-tensor-map (US) | Historic USGS Moment Tensor Solutions Map | usb000enwr | |
historical-moment-tensor-map (US) | Historic USGS Moment Tensor Solutions Table | usb000enwr | |
origin (US) | Earthquake XML (EQXML) | usb000enwr | |
p-wave-travel-times (US) | Theoretical P-Wave Travel Times Map for the World | usb000enwr | |
p-wave-travel-times (US) | Theoretical P-Wave Travel Times Table | usb000enwr | |
phase-data (US) | Earthquake XML (EQXML) | usb000enwr |
The use of EQXML formatted data is temporary. This data will be
changing to
QuakeML v1.2RC3 format.
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