A minor earthquake hit central New Hampshire Thursday morning.

The US Geological Survey recorded the 2.1 magnitude tremor near Contoocook just before 6.

It’s the second small earthquake in the Granite State in as many days.

A 2.3 magnitude earthquake was recorded near Sanbornton early Wednesday morning.

Via the USGS

  The U.S. Geological Survey reports there's been a small earthquake near Concord, New Hampshire.

The 1.7 magnitude earthquake was recorded at 9:42 p.m. Thursday about a mile northeast of Concord.

No injuries were reported.

The earthquake was the topic of chatter on social media when it struck, with area residents reporting the sound of a loud bang and minor tremor.


NHPR / Michael Brindley

While New Hampshire may not be known for earthquakes, the town of Merrimack is now host to the Granite State’s first seismograph available for public use.

Library Director Yvette Couser got her introduction to earthquakes about two years ago.

Scott McPherson for NHPR

10:14 Earthquake monitored in real time at 9:07 PM from the Weston Observatory. Link is here. 

10:05 Map posted on the Weston Observatory site indicates epicenter located 5 Km northwest of Contoocook, with a magnitude of 2.5.

9:55 Seismographic data from the Weston Observatory shows activity at approximately 9:08 PM.

The Women's Earth Alliance

Dec 14, 2012

E - The Environmental Magazine

Dear EarthTalk: I heard about a group called the Women’s Earth Alliance that works on environmental projects in many parts of the world. What kinds of projects?                                                       -- Judy Stack, Barre, VT

A rare 4.0 magnitude earthquake rattled New England, last night. While some of our readers on the West Coast would barely even blink with such a shake, it caused confusion and consternation for many around the epicenter about 30 miles outside of Portland, Maine.

The Bangor Daily News reports that the largest earthquake to strike the region measured 5.1 and it happened in 1904.

Quake Hits Maine, Rattles N.H.

Oct 16, 2012
USGS ShakeMap / U.S. Geological Survey

An earthquake has struck southern Maine and rattled nearby New England states.

The U.S. Geological Survey  said the epicenter of the quake was about 3 miles west of Hollis Center, Maine, and about 3 miles deep. That location is about 20 miles west of Portland.

The quake was felt in Vermont, New Hampshire and Massachusetts, including Boston, and as far south as Rhode Island and Connecticut.

The U.S. Geological Survey will soon confirm that the oil and gas industry is creating earthquakes, and new data from the Midwest finds that these man-made quakes are happening more often than originally thought.

Earthquakes happen when faults in the Earth slip and slide against each other. There's continuous stress on innumerable faults on our continent, but seismologists like Bill Ellsworth, from the U.S. Geological Survey, started seeing something odd about 12 years ago.

Photo by Gilderic, courtesy of Flickr Creative Commons

Where are all these fracking earthquakes coming from? The correlation between natural gas and shifting plates.  Also, Agent Twitter and Double-O-Social Media: predicting riots, epidemics and other social phenomena through aggregate online data. Plus, World of Adcraft: the growing gimmicks of big-budget video game advertisements.  And an interview with Chuck Palahniuk, author of Fight Club and Choke.  His latest novel is Damned.

Photo by Martin Luff, courtesy of Flickr Creative Commons
(Photo by <a href="" target="_blank">martinluff</a> via Flickr Creative Commons)

The magnitude 5.8 earthquake that rattled the east coast back in August triggered speculation about whether the controversial gas drilling technique called fracking may have been responsible. Fracking involves drilling thousands of feet into the shale deep below the earth’s surface, then fracturing the earth by pumping millions of gallons of sand, water, and chemicals into the shale to release natural gas. So far, contamination of groundwater supplies has been the focus of those opposing big energy’s push to expand fracking.

(Photo by <a href="" target="_blank">Dave Schumaker</a> via Flickr Creative Commons)

The growing evidence for a connection between the controversial drilling technique called"fracking" and earthquakes. A shocking tactic used by a Connecticut high school to clear the hallways for a drug search. And a new documentary follows a group of friends on their journey from impulsive teenagers to soldiers in Afghanistan, and then back again.