Earthquakes in California and other regions of the U.S.: recorded seismic activity and preventive measures

Earthquakes represent one of the most challenging natural phenomena in U.S. territory, especially in areas like California, where seismic activity is particularly frequent. During the recorded period between January 22 and 23, the United States experienced a significant number of ground movements, according to official data from the United States Geological Survey (USGS). This report details the epicenters, magnitudes, and precise locations of these natural events that affected various regions of the country.

Seismic activity in California and the U.S. territory

Within the 24-hour span of that January period, a total of 21 earthquakes with magnitudes over 2.5 occurred in North America and the Caribbean region. Of these events, four took place on the U.S. mainland, although the strongest occurred in Wyoming, not specifically in California. However, the U.S. West Coast, where California is located, experienced notable seismic activity.

California experienced a magnitude 2.7 quake located 70 kilometers west of Ferndale, recorded on January 23. Although moderate compared to other quakes in the same period, this event reflects the region’s constant susceptibility to ground movements. California remains one of the highest seismic risk areas in the United States due to the proximity of the San Andreas Fault and other active geological structures.

Main epicenters: regional seismic activity analysis

The most significant epicenters were mainly concentrated in Alaska, with several moderate to large magnitude events. The strongest recorded during the period was located 120 kilometers southeast of Sand Point, Alaska, with a magnitude of 5.2. Another notable quake occurred 293 kilometers southeast of Attu Station, Alaska, with a magnitude of 5.0.

On the U.S. mainland, the most notable epicenter was 40 kilometers south of Evanston, Wyoming, reaching a magnitude of 4.7. This Wyoming area has shown significant seismic activity in recent years, participating in the Rocky Mountain seismic belt.

Regarding California, besides the Ferndale event mentioned earlier, other tremors were distributed near the Pacific coast. The region also experienced a magnitude 2.5 earthquake located 35 kilometers west of Gerlach, Nevada, an adjacent area sharing similar geological features with California.

Other notable epicenters were located in Puerto Rico, with a magnitude 2.7 quake five kilometers southwest of Central Aguirre, reflecting Caribbean seismic activity. Alaska continued to be the most affected region, with multiple tremors across its extensive territory, from Shungnak (magnitude 2.8) to Tatitlek (magnitude 3.2).

How to prepare for an earthquake? Prevention strategies

Although it is impossible to predict the exact arrival of an earthquake, there are concrete measures residents in seismically active zones like California can implement to minimize risks.

Essential preparations before a quake:

• Develop a clear evacuation plan and practice it regularly with all household members
• Keep a fully stocked emergency kit with disinfectants, pain relievers, bandages, gauze, hydrogen peroxide, blankets, and a whistle for calls for help
• Prepare a waterproof folder containing essential identification documents, proof of ownership, and other critical papers
• Identify and mark safe zones within the home (load-bearing structures, interior corners)
• Secure heavy furniture and objects that could fall during shaking

During and after the quake: recommended actions

During the earthquake:

When the seismic alert sounds or the ground movement is felt, it is crucial to follow instructions from trained safety and evacuation teams. If you are on an upper floor and cannot evacuate quickly, go immediately to a previously identified safe zone.

Priority actions include:

• Move away from windows, mirrors, and structures that could collapse
• Avoid stairs and elevators during shaking
• Stay calm and help others if possible
• Cover your head with your arms or a sturdy object

After the ground movement stops:

Once the quake has ended, it is essential to wait for instructions from local authorities and emergency services. They will check for structural damage and determine if it is safe to stay or evacuate.

• Check the physical and emotional well-being of all family members
• Avoid making phone calls to keep emergency lines free
• Use text messages or alternative apps to contact loved ones
• Stay alert for aftershocks
• Inspect your home for gas leaks, electrical damage, or structural issues
• Remember that after a significant earthquake, smaller tremors may occur in the hours or days following

Constant preparedness and knowledge of these measures are vital for those living in seismic risk areas like California and other earthquake-prone regions in the United States.