4.7 Magnitude Earthquake Strikes Near Susanville, CA on Dec. 28

A 4.7 magnitude earthquake struck near Susanville, California, on December 28, shaking the region at 4:41 PM. The quake originated at a depth of 4 miles, with its epicenter approximately 9 miles north-northwest of Susanville. Although initially reported as 4.8, the U.S. Geological Survey (USGS) later adjusted the magnitude to 4.7.

Impact and Community Response

The earthquake prompted significant attention, with 359 responses collected through the USGS Felt Report, indicating that many experienced the tremor. Residents in cities including Roseville, Reno, and Tahoe City reported strong shaking.

Expected Safety and Loss Concerns

The USGS has issued a green alert concerning potential fatalities and economic losses linked to shaking, suggesting a low likelihood of serious damage or casualties. However, previous earthquakes in this area have raised concerns regarding secondary hazards like landslides and liquefaction.

Local Infrastructure and Earthquake Preparedness

The structures in the region are predominantly designed to withstand seismic activity, although some older buildings, such as unreinforced brick masonry, may still be vulnerable. Residents are encouraged to report any damage and share images from the quake.

Understanding Earthquake Magnitudes

• Magnitude measures energy released during an earthquake.
• Modern seismic scales have replaced the old Richter scale.
• Quakes of 2.5 to 5.4 are usually felt but rarely cause damage.

Globally, an estimated 500,000 detectable earthquakes occur each year, with 100,000 being felt. Only around 100 of these result in damage.

Earthquake Safety Tips

When experiencing an earthquake, immediate action is crucial for safety. Here are essential tips:

• In a vehicle: Pull over safely and set the parking brake.
• In bed: Lie face down; cover your head with a pillow.
• Outdoors: Stay clear of buildings and hazards.
• Indoors: Stay put; avoid doorways and move under sturdy furniture.

Officials stress the need to drop, cover, and hold on during shaking. Being prepared can help mitigate risks associated with the aftermath, such as gas leaks or downed power lines, plus anticipate aftershocks.

El-Balad encourages community members to remain vigilant and prepared for future seismic activity.