Strong Earthquake Strikes Iran
Map of earthquake location today (April 9, 2013) in Iran.
Credit: USGS.

An earthquake of preliminary magnitude 6.3 struck today in southern Iran, according to the U.S. Geological Survey (USGS).

The USGS expects that significant damage and casualties are likely, and Iran's state media is already reporting that at least three people have died, according to Reuters.

The temblor's epicenter was 55 miles (89 km) southeast of Bushehr, the city where Iran's only nuclear power station is located. The quake originated 6.2 miles (10 km) deep and struck at 4:22 p.m. local time (1152 UTC), the USGS reports.

Earthquakes of this size are considered major and can cause significant damage, especially with poorly built structures. Even well designed buildings can be damaged or, in some cases, destroyed depending on the severity of the quake and a building’s proximity to the epicenter. Earthquakes of this size are sometimes followed by significant aftershocks. But the damage caused by any single event depends on the quake's depth, proximity to populated areas, building standards in the region, as well as the type of earthquake. The USGS frequently updates the magnitude of an event after more data is analyzed.

An earthquake's magnitude is a measure of the energy released at the source. It is just one predictor of the shaking that may ensue, which is affected by local and regional geology. Scientists know in a general sense what causes Earthquakes but are unable to predict specific quakes.

This article will be updated if significant additional information becomes available. Find more earthquake news here.