A earthquake magnitude of 7.2 Rocked Baja California

Sunday, April 4, 2010

A powerful earthquake in Baja California rocked the U.S.-Mexico border region Sunday, collapsing a parking structure south of the border and causing power outages in both countries as it sent out seismic waves felt from Los Angeles to Las Vegas and Arizona.


The 7.2-magnitude quake struck at 3:40 p.m. about 19 miles southeast of Mexicali, a bustling commerce center on the Mexican side of the border where trucks carrying goods cross into California. More than 900,000 people live in the greater Mexicali area.

It was the largest earthquake in the region in nearly 18 years and was followed by aftershocks or distant "triggered" earthquakes on both sides of the border, said U.S. Geological Survey seismologist Lucy Jones.

Millions residents in California, Arizona., Mexico feel the effects of the 7.2 earthquake magnitude

Baja California State Civil Protection Director Alfredo Escobedo said a man was killed when his home collapsed just outside of Mexicali and that there were reports of more people trapped in homes in the area.

Rescue teams with dogs and digging equipment were rushing to the city from nearby Tijuana, but a landslide along that highway was slowing traffic.

All 300 patients had to be evacuated from the Mexicali General Hospital to other clinics because the building had no electricity or water, Escobedo said. Blackouts were widespread throughout the city and telephone communication was patchy.

The parking garage at Mexicali's city hall also collapsed, Escobedo said, but no one there was hurt.

As darkness fell there were growing reports of damage on the U.S. side of the border in Calexico, a city of about 27,000, but no injuries.

Seismologists said there have been many earthquakes in the region including many in the magnitude-3.0 range before Sunday's big shock.

"The last time we had an earthquake this large in either Baja or California was in 1992 with the Landers Earthquake, which was 7.3," Jones said.

The USGS reported three strong aftershocks within the hour, including a magnitude-5.1 jolt in the Imperial County desert east of San Diego. Magnitude-4.5 and magnitude-4.3 aftershocks were also reported. Another occurred off Malibu.

The 7.2-magnitude quake was felt as far north as Santa Barbara, USGS seismologist Susan Potter said. It was one of the strongest to hit California in recent history. Only one has been stronger — a 7.3 quake that hit Landers, Calif., and left three dead in 1992 — and there were at least two other 7.2-magnitude quakes in the last 20 years.

Seismologists also said a number of small quakes were triggered in a geothermal area in Northern California.

More than 5,000 Southern California Edison customers were affected, mostly with about 30 seconds of flickering lights. Several hundred had longer outages.


Source: Associated Press

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