(FOX 11/CNS) A magnitude-4.0 earthquake rattled portions of the South Bay today, but there were no immediate reports of damage or injuries.
The quake, which was originally reported with a magnitude of 3.9 but was quickly upgraded, struck at 1 p.m. six miles south of Rancho Palos Verdes and seven miles southwest of San Pedro, according to the U.S. Geological Survey.
It was the latest in a series of temblors that have hit the Southland in recent weeks. Three quakes have struck in the Marina del Rey area -- a magnitude-3.0 on Thursday afternoon, a magnitude-2.8 around 8 p.m. April 28 and a magnitude-3.2 quake around 8 p.m. April 26.
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What To Do Right After An Earthquake (from ready.gov):
When the shaking stops, look around to make sure it is safe to move. Then exit the building.
Expect aftershocks. These secondary shockwaves are usually less violent than the main quake but can be strong enough to do additional damage to weakened structures and can occur in the first hours, days, weeks, or even months after the quake.
Help injured or trapped persons. Remember to help your neighbors who may require special assistance such as infants, the elderly and people with access and functional needs. Give first aid where appropriate. Do not move seriously injured persons unless they are in immediate danger of further injury. Call for help.
Look for and extinguish small fires. Fire is the most common hazard after an earthquake.
Listen to a battery-operated radio or television for the latest emergency information.
Be aware of possible tsunamis if you live in coastal areas. These are also known as seismic sea waves (mistakenly called "tidal waves"). When local authorities issue a tsunami warning, assume that a series of dangerous waves is on the way. Stay away from the beach.
Use the telephone only for emergency calls.
Go to a designated public shelter if your home had been damaged and is no longer safe. Text SHELTER + your ZIP code to 43362 (4FEMA) to find the nearest shelter in your area (example: shelter 12345).
Stay away from damaged areas. Stay away unless your assistance has been specifically requested by police, fire, or relief organizations. Return home only when authorities say it is safe.
Be careful when driving after an earthquake and anticipate traffic light outages.
After it is determined that its' safe to return, your safety should be your primary priority as you begin clean up and recovery.
Open cabinets cautiously. Beware of objects that can fall off shelves.
Put on long pants, a long-sleeved shirt, sturdy shoes and work gloves to protect against injury from broken objects.
Clean up spilled medicines, bleaches, gasoline or other flammable liquids immediately. Leave the area if you smell gas or fumes from other chemicals.
Inspect the entire length of chimneys for damage. Unnoticed damage could lead to a fire.
Check for gas leaks. If you smell gas or hear blowing or hissing noise, open a window and quickly leave the building. Turn off the gas at the outside main valve if you can and call the gas company from a neighbor's home. If you turn off the gas for any reason, it must be turned back on by a professional.
Look for electrical system damage. If you see sparks or broken or frayed wires, or if you smell hot insulation, turn off the electricity at the main fuse box or circuit breaker. If you have to step in water to get to the fuse box or circuit breaker, call an electrician first for advice.
Check for sewage and water lines damage. If you suspect sewage lines are damaged, avoid using the toilets and call a plumber. If water pipes are damaged, contact the water company and avoid using water from the tap. You can obtain safe water by melting ice cubes.