3/25/2015 — Rare Chicago Earthquake — 2.9 Magnitude strikes in the middle of Midwest unrest event

Update March 26, 2015 – 630am CDT:

Last nights odd earthquake in Chicago… reports from the event coming in.. people reported hearing a “thunderous sound” accompanying the rare seismic event.

Media report here:

“The U.S. Geological Survey reported a quake of magnitude 2.9 hit about 1-1/4 miles west of Lake in the Hills at 6:08 p.m. USGS data show that if confirmed, it would be the biggest seismic event in the Chicago area since one near a McCook quarry on Nov. 4, 2013, measuring 3.2. Before that, the largest in recent years was Feb. 10, 2010, when a 3.8 quake hit near Elgin.

East Dundee resident Julie Loewe said she was watching television in her room when she heard “a thunderous sound.”

“My son ran into my room saying, ‘Was that an earthquake?’ and I said, ‘I think so.’ My walls were shaking,” Loewe said.

She said she was one of the first of her friends to post on Facebook that she thought an earthquake had occurred.

“And then it was confirmed,” she said.”


Original post below:

As we’ve been saying for the past several days, there has been obvious seismic pressure building in the Midwest.

After a swarm of 4.0 magnitude earthquakes across Oklahoma, and Kansas, as well as a series of 3.0M-4.0M earthquakes in Colorado and Texas — now a 2.9 magnitude earthquake has struck Chicago Illinois.

2.9m march 25 2015
Above: March 25, 2015 – 2.9 magnitude earthquake strike NW of Chicago Illinois

Earthquake epicenter view from the USGS:

2.9m march 25 2015a


Scientific – Summary


Magnitude / uncertainty 2.9 mb_lg± 0.1
Location / uncertainty 42.185°N 88.357°W± 2.2 km
Depth / uncertainty 9.9 km± 7.6
Origin Time
Number of Stations
Number of Phases 32
Minimum Distance 36.85 km (0.33°)
Travel Time Residual 0.64 sec
Azimuthal Gap 33°
FE Region Illinois (466)