Earthquake Rumbles through Northeast Londonderry Shaking at 7:13pm

Many neighbors were out checking around homes tonight looking for that big pine that may have fallen on the house.  As it turns out an earthquake 5km west of Hollis Center Maine occurred at 7:12 tonight.

You can report this on your own at the Earthquake reporting website.

Event Time

  1. 2012-10-16 23:12:22 UTC
  2. 2012-10-16 19:12:22 UTC-04:00 at epicenter
  3. 2012-10-16 19:12:22 UTC-04:00 system time

Location

43.611°N 70.661°W depth=5.0km (3.1mi)

Nearby Cities

  1. 5km (3mi) W of Hollis Center, Maine
  2. 21km (13mi) NW of Biddeford, Maine
  3. 21km (13mi) NW of Saco, Maine
  4. 22km (14mi) WNW of West Scarborough, Maine
  5. 83km (52mi) ENE of Concord, New Hampshire

Reports from the USGS at 7:12 indicated that the quake was a 4.6 magnitude.  That was modified overnight to a 4.0 reading.

Shake Map

Shake Map from 4.0 earthquake in Maine October 16, 2012

Many reports coming in by Twitter to our breaking news.  Thanks readers!

More information on New England Earthquakes from the USGS

Tectonic Summary
Earthquakes in New England
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.

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Quake Shakes Up Southern Canada, Northern United States

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An Earthquake struck today, at about 1:41 PM local time. Reports have come in across Southern Canada and Northern United States, from Quebec, Canada, east to London, Canada. Thus far, over 13,000 people have reported feeling the quake, in more than 251 cities. The strongest reports from the earthquake have been centralized near the Quebec/Ontario border.

Locally, reports from Concord, Exeter, Merrimack and Nashua, New Hampshire have been made. Twenty reports from Concord alone have been sent to the United States Geological Survey (USGS). Eleven reports from Cambridge, Massachusetts have also been made.

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According to USGS, the earthquake measured in at a Magnitude of 5.0. The center of the quake was about 33 miles North/Northeast of Ottawa, Ontario, Canada. The estimated depth of the earthquake was 11.2 miles.

For three centuries, residents in this region on Canada have suffered from small harmless quakes, as well as larger, more devastating ones. The two worst earthquakes occurred in 1935, as a 6.1 magnitude, and in 1732 as a 6.2 magnitude. Earthquakes in this seismic zone cause substantial damage about once every ten years. Smaller earthquakes can sometimes be felt up to four times a year.

For more information about earthquakes in both Canada, and across the United States, or to report if you felt today’s quake, visit the United States Geological Survey website.

Don’t forget to let us know if you felt it!

To let the USGS know you felt it click HERE!

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