A minor earthquake with a magnitude of 2.1 occurred near San Ramon, California, on December 8. The U.S. Geological Survey (USGS) reported that the tremor struck at 2:11 a.m. Its epicenter was located approximately 2 miles southeast of San Ramon and at a depth of 5 miles.
Community Response
Following the quake, four individuals reported feeling the tremor through the USGS’s Felt Report form. Community members are encouraged to submit their experiences.
Recent Seismic Activity
This incident follows a magnitude 2.6 quake detected in the vicinity of Livermore just two days prior, indicating ongoing seismic activity in the region.
Understanding Earthquakes
Magnitude indicates the energy released by an earthquake, with the USGS stating that this scale replaces the older Richter scale. Here’s a brief overview of earthquake magnitudes:
- Quakes from 2.5 to 5.4 are usually felt but rarely cause significant damage.
- Events below 2.5 are often unnoticed by the general population.
Earthquakes can result in various hazards including fires, tsunamis, landslides, and avalanches. While they can occur anywhere, they are most frequent in:
- Alaska
- California
- Hawaii
- Oregon
- Puerto Rico
- Washington
An estimated 500,000 detectable earthquakes occur worldwide each year. Of these, around 100,000 can be felt, while 100 might cause damage.
Safety Measures During an Earthquake
Experts recommend immediate actions to ensure safety during an earthquake. Here are some guidelines:
- In a vehicle: Pull over, stop, and engage the parking brake.
- In bed: Turn face-down and shield your head with a pillow.
- Outdoors: Stay clear of buildings.
- Indoors: Remain inside, avoid doorways, and stay away from windows.
The best practice during an earthquake is to “drop, cover, and hold on.” If available, take shelter under a sturdy table, holding on with one hand ready to move with the shelter. Be mindful that hazards may arise after the quake, including structural damage, gas leaks, and downed power lines.
Preparedness for Aftershocks
Aftershocks may follow the main event. Always be prepared to drop, cover, and hold on during these tremors. Remaining informed is essential for safety in the event of seismic activity.
