Screenshot via USGS

The  U.S. Geological Survey reports another mid-size shake hit Southern California on Wednesday at 9:33 a.m. five miles below the surface with a magnitude of 4.5 and located within two miles from last night's 4.4 Yorba Linda episode and aftershocks.

Officials revised their initial estimate of the earthquake's magnitude down to 4.1 then back to 4.5. Yorba Linda is locatated about 30 miles southeast of downtown Los Angeles. 

No injuries or damage has been reported from either quake.

USGS shows responses from people who felt the quake more than a 100 miles away in Santa Barbara and Oxnard.

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AP Photo/Marcio Jose Sanchez

A small earthquake occurred in the San Bernardino Mountains northeast of Big Bear Lake on Thursday, reports the U.S. Geological Survey.

The growler hit the area at 11:18 a.m., registering a preliminary magnitude of 3.5, and reported to have occured at a depth of about 2.5 miles. Initial USGS readings positioned the the epicenter three miles north of Big Bear City (82 miles east-northeast of Los Angeles).

USGS seismologists later revised the details to reflect a depth of 4.5 miles.

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Courtesy USGS

A 3.9 quake was recorded about a mile from San Juan Capistrano around 10:37 a.m. Many people in Orange County said they felt a huge jolt.

Though the USGS reports this morning's mini quake as 3.9-magnitude, OC folks have reported feeling more than a little shake. The earthquake, located about one mile from San Juan Capistrano, was recorded just after 10:30 a.m. Monday morning.

A 3.9 magnitude earthquake occurred 1.24 mi W of San Juan Capistrano, CA. Details: eqbot.com/e2a Map: eqbot.com/e2V

— LA QuakeBot (@earthquakesLA) April 23, 2012

The earth moved under Southern California from Northeast LA to Huntington Beach to the headquarters of the OC Register and points between. The tectonic shakedown was reportedly felt as north as Glendale.

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People run to safety on the streets of Mexico City after a strong quake hits Mexico on March 20, 2012.

YURI CORTEZ/AFP/Getty Images

A young man holds his dog after leaving his house in Mexico City after an strong earthquake hit Mexico on March 20, 2012.

YURI CORTEZ/AFP/Getty Images

A man walks over the debris fell from a building in Mexico City damaged during a strong quake that hit Mexico on March 20, 2012.

RONALDO SCHEMIDT/AFP/Getty Images

A member of the Mexican Red Cross assists a woman as thousands remain on the streets in Mexico City after a strong quake hit Mexico on March 20, 2012.

RONALDO SCHEMIDT/AFP/Getty Images

People remain out in the streets in Mexico City after a strong quake hit Mexico on March 20, 2012. A powerful 7.6-magnitude earthquake struck southwest Mexico, causing residents in the capital several hundred miles away to rush out onto the streets but no immediate reports of serious damage.

A strong magnitude 7.4 earthquake with an epicenter in Guerrero, Mexico struck on Tuesday morning, according to the U.S. Geological Survey. There were initial reports of minor damage, including to the U.S. Embassy in Mexico City.

Mexico City Mayor Marcelo Ebrard's Twitter account said the water system and other "strategic services" were not experiencing problems. Frightened workers and residents poured into the streets of the capital just minutes after noon local time.

Iniciamos revision de cuarteaduras u otros efectos en edificios

— Marcelo Ebrard (@m_ebrard) March 20, 2012

President Felipe Calderon said there were no immediate reports of damage through his Twitter account. Telephone service was down in the city and throughout the area where the quake was felt.

RT @jillrep: Felipe Calderón says no major damage reported as yet from Mexico City #quake-Confirmed by Twitter traffic from Acapulco, so far

— Fronteras Desk (@fronterasdesk) March 20, 2012

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