SEATTLE — Officials are tracking the largest swarm of earthquakes in more than 15 years on Washington's Mount Rainier but say there is no indication that the cluster of quakes is cause for concern.

Another 2.6-magnitude earthquake rattled Tennessee on July 9 around 8:52 p.m., according to the U.S. Geological Survey.

The fault has moved the curbs as much as a handspan, around 18 centimeters, since the time they were installed, up to 60 ...

The focal mechanism provides seismological constraints on the geological faults that generate the earthquakes and thus is important for regional seismotectonic research. Focal mechanism calculation ...

A previously unknown stretch, or strand, of the fault is actively moving about a tenth of an inch per year as it runs beneath residential neighborhoods in the Ygnacio Valley. "Many of the ...

Geologic map of the Arabian Shield showing the major geologic terranes and their boundaries, Najd fault system, and sedimentary basins (modified after Al-Amri et al., 2004) and the seismic activity ...