An earthquake with a preliminary magnitude of 4.6 gave the Bay Area a big jolt early Monday morning. The quake with an epicenter in Berkeley struck at approximately 2:55 a.m.

HUMBOLDT COUNTY, CA - the U.S. Geological Survey reported that a 2.1 magnitude quake shook near Petrolia Tuesday morning.

A 6.2 magnitude earthquake struck Venezuela on Wednesday. The quake shook Caracas and other cities. Its epicenter was near Mene Grande. Tremors were felt in Colombia and Caribbean islands. No major damage was reported initially.

A 6.2-magnitude earthquake has jolted northwest Venezuela, according to the U.S. Geological Survey. The quake struck on Wednesday with its epicenter near the community of Mene Grande.

Several aftershocks have struck Berkeley in the same area where a 4.3 earthquake hit early Monday morning, shaking the Bay Area.

Surprisingly, they found that only around 10% of a quake’s energy causes the physical shaking most people associate with earthquakes. Overall, anywhere between 68 and 98% of the energy goes into generating heat around a quake’s epicenter. Less than 1% of that energy is used to break up rock and create new surfaces.

Most earthquake energy turns into heat rather than ground shaking, sometimes hot enough to melt rock in microseconds. MIT’s lab quakes reveal this hidden balance and its role in seismic risk.