The magnitude-4.0 earthquake that rattled people awake across the Puget Sound region last Wednesday probably struck on the western edge of the Seattle Fault, according to geologists.
Man-made earthquakes, a side effect of some high-tech energy drilling, cause less shaking and in general are about 16 times weaker than natural earthquakes with the same magnitude, a new U.S. study found.
(AP)—Seismologists in Alaska say earthquakes have jolted four different parts of the state in the last 12 hours.
States where hydraulic fracturing is taking place are experiencing unprecedented earthquake activity.
The U.S. Geological Survey has recorded seven small earthquakes shaking central Oklahoma in a span of about 14 hours.
Earthquakes used to be almost unheard of on the vast stretches of prairie that unfold across the U.S. Midwestern states of Texas, Kansas and Oklahoma.
Seismologists say a moderate earthquake that shook northwest Alaska on Monday was the fifth of the same magnitude since April in an area with otherwise little activity.
A powerful magnitude-7.2 earthquake shook central and southern Mexico on Friday, sending panicked people into the streets. Some walls cracked and fell, but there were no reports of major damage or casualties.
Authorities in northern Chile discovered surprisingly light damage and just six reported deaths Wednesday from a magnitude-8.2 quake—a remarkably low toll for such a powerful shift in the Earth's crust.