Earthquakes in the United States: earthquake records, times, and epicenters registered in January

The U.S. territory constantly experiences natural phenomena that require continuous monitoring, especially in areas prone to seismic activity. Through the United States Geological Survey (USGS), all earthquakes occurring in the country are documented and recorded. During the evaluated period in January, multiple seismic events with varying intensities and precise locations were registered, thanks to this institution’s real-time monitoring system.

Earthquake Records: Affected Areas, Magnitudes, and Exact Times

In the last 24 hours of the analyzed period, the USGS monitoring network identified a total of 21 earthquakes in North America and the Caribbean with magnitudes greater than 2.5. Of these events, four occurred on the U.S. mainland, with the most significant being a quake located 40 kilometers from Evanston, Wyoming, with a magnitude of 4.7.

The geographic distribution of the earthquakes was considerable, mainly affecting Alaska, followed by events in Nevada, California, Wyoming, and Puerto Rico. Below are the most relevant records ordered by intensity and time:

Largest earthquakes recorded:

• Magnitude 5.2: Located 120 kilometers southeast of Sand Point, Alaska. Date and time: January 22 at 19:38 UTC (equivalent to 10:38 local time in Anchorage)

• Magnitude 5.0: Located 293 kilometers southeast of Attu Station, Alaska. Date and time: January 23 at 08:25 UTC (January 22 at 23:25 in Anchorage)

• Magnitude 4.7: Located 40 kilometers south of Evanston, Wyoming. Date and time: January 22 at 14:49 UTC (7:49 local time in Cheyenne)

Moderate earthquakes recorded during the period:

Earthquakes with magnitudes between 3.0 and 3.4 mainly concentrated in Alaska, with events documented at distances ranging from 32 to 145 kilometers from populated centers such as Sand Point, Chiniak, Cantwell, and Tatitlek. Meanwhile, minor events with magnitudes from 2.5 to 2.8 were distributed among locations like Shungnak, Ninilchik, Gerlach, Central Aguirre, Kokhanok, and Clam Gulch, reflecting dispersed but constant seismic activity.

The USGS System: Continuous Monitoring and Exact Event Times

The United States Geological Survey maintains a network of strategically distributed seismographs across the country, enabling immediate detection of earthquakes and precise recording of their time, epicenter, and magnitude. This system provides real-time information through an interactive map called “Latest Earthquakes,” which continuously communicates seismic movements to the public.

The ability to record the exact time of each event is essential for analyzing seismic patterns and identifying potential risks in specific regions. Alaska, due to its location on the Pacific Ring of Fire, experiences particularly high seismic activity, while other continental regions show lower earthquake frequency.

Prevention and Protection Measures Against Earthquakes

Although it is impossible to predict when an earthquake will occur, proven strategies exist to minimize risks and protect people’s physical safety. Preparedness is especially important in high seismic activity zones or densely populated areas.

Pre-earthquake preparation:

• Develop a clear evacuation plan with safe routes and designated meeting points
• Prepare an emergency kit containing disinfectants, pain relievers, anti-inflammatories, bandages, gauze, hydrogen peroxide, thermal blanket, and an emergency whistle
• Store essential identification documents in a waterproof container
• Identify and familiarize yourself with safe areas at home or work (load-bearing wall corners, under sturdy door frames)

Actions during an earthquake:

If seismic alert is activated, it is a priority to follow safety and evacuation instructions from building safety teams. For residents on floors above the third, where quick evacuation may be impossible, it is critical to pre-position in designated safe zones. During the event, avoid staying near windows, stairs, elevators, or furniture that could fall, and remain calm to make correct decisions.

Post-event procedures:

Once the seismic movement has ceased, it is essential to wait for instructions from authorities and safety brigades, who will assess structural damages before allowing re-entry into buildings. Checking the physical and emotional well-being of all family members is a priority. Experts recommend avoiding phone calls to prevent overloading emergency lines, instead using text messages or alternative communication channels.