LA Beach Signs Warn of Tsunami Threat

Like many Californians who put down roots in earthquake country, Robin Rudisill knows the “Big One” could strike without warning. Yet from her Venice beachfront duplex, Rudisill worries about a different massive blow from Mother Nature — a tsunami.

Her 1950s-era home — with its cool ocean breeze and golden sunsets — sits smack in the heart of a potentially deadly tsunami zone. If that big one ever came ashore, scientists say, it could raze the landscape from the sun-kissed beach to about a mile inland.

To alert homeowners and beachgoers that they are in tsunami territory, the city of Los Angeles has begun posting blue and white “TSUNAMI HAZARD ZONE” signs with an image of ominous-looking waves. The signs, which have surfaced in beach parking lots and at major intersections in Venice and other low-lying communities, also point out evacuation routes.

“It makes it clear that we are in an inundation zone, which most people did not previously, and many still do not, know,” said Rudisill, who pushed for the signs.

While a tsunami threat to the Golden State is real, the potential for killer waves is far less likely than the earthquakes, wildfires, landslides and floods that plague the nation’s most populous state.

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San Andreas Quake Swarms Watched By Scientists

In Southern California, scientists have their eye on a swarm of quakes in the desert. More than 450 quakes have hit near the Salton Sea since March 21.

The southern end of the San Andreas Fault hasn’t snapped in more than 300 years. But scientists worry small quakes could act as a trigger for the big one.

“It’s very close to the locked section of the San Andreas Fault. Anything seismically that happens there definitely gets our attention,” said Cal Tech Seismologist Kate Hutton.

Scientists are installing 22 motion sensors on the 800 mile fault line that slices California from San Francisco to the Salton Sea.

A temblor in the southern end of the fault could hit San Diego County within a minute of rupture.

Experts say everyone should have earthquake preparedness kits ready with plenty of food and water stocked up.

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Southern California Quake Swarm: A Precursor to the Big One?

There has been a swarm of earthquakes in one area of Southern California that scientists in Pasadena are watching closely, with more than 20 temblors hitting this morning.

The biggest of the 24 quakes recorded this morning was a magnitude-4.8 which struck at 4:55 a.m. near the Salton Sea in Imperial County, according to the U.S. Geological Survey.

The quake was centered three miles south of the small town of Bombay Beach and 90 miles east of San Diego.

It was followed by a swarm of smaller quakes, which were recorded between 4:58 a.m. and 6:14 a.m. around Bombay Beach. Most of those temblors registered lower than a 3.0-magnitude, officials said.

There were no immediate reports of any injury or damages.

Scores of small quakes have shaken the area in recent days.

The activity has sparked the interest of scientists who want to see if small faults crossing under the Salton Sea are transferring energy to a section of the more dangerous San Andreas fault, which has not popped in more than 300 years.

An earthquake that starts in Bombay Beach and ripples northwest along the San Andreas fault could be the Big One that devastates Los Angeles, Graham Kent, a research geophysicist at UC San Diego, told the Los Angeles Times.

The activity is being monitored by a system run the U.S. Geological Survey and Caltech in Pasadena.

In a 48-hour period starting Saturday morning, 42 quakes shook just south of Bombay Beach on the Salton Sea, ranging in magnitude from 0.5 to 3.3.

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