Earthquake in the United States: Seismic records from January 23 and safety measures

On January 23rd, the United States Geological Survey (USGS) recorded significant seismic activity affecting multiple regions across the country, including areas in Alaska, Hawaii, Puerto Rico, and continental states. This earthquake activity in the United States reflects the constant geological dynamics characteristic of American territory, especially in its most seismically active regions. Official USGS data reveal that in the 24 hours prior to this period, a variety of ground movements were documented, with some of the most notable detailed below.

Documented Seismic Activity: Epicenters and Magnitudes

Through the USGS monitoring system, the federal agency recorded a total of 21 earthquakes with magnitudes greater than 2.5 in North America and the Caribbean during the 24-hour period including January 23rd. Of these events, four occurred within the continental United States, with the strongest being a quake located approximately 40 kilometers from Evanston, Wyoming, with a magnitude of 4.7, which occurred on January 22nd at 14:49 UTC (07:49 in Cheyenne).

USGS records show a notable concentration of seismic activity in Alaska, a region historically known for its high frequency of geological events. This pattern is due to the complex interaction of tectonic plates in the North Pacific zone, making Alaska one of the most seismically active areas on the continent.

Largest Magnitude Earthquakes During the Day

Among the most significant events recorded during this period are several tremors exceeding magnitude 5.0:

Strongest earthquake epicenter: A ground movement of magnitude 5.2 was located 120 kilometers southeast of Sand Point, Alaska, on January 22nd at 19:38 UTC (10:38 in Anchorage). This was the most powerful quake in the analyzed period.

Second notable tremor: An event of magnitude 5.0 was recorded 293 kilometers southeast of Attu Station, Alaska, on January 23rd at 08:25 UTC (23:25 on January 22 in Anchorage).

In addition to these main events, multiple moderate to light earthquakes were documented:

• 57 km south of Shungnak, Alaska: magnitude 2.8 (January 23, 11:19 UTC)
• 71 km northwest of Ninilchik, Alaska: magnitude 2.5 (January 23, 09:55 UTC)
• 35 km west of Gerlach, Nevada: magnitude 2.5 (January 23, 09:13 UTC)
• 259 km southeast of Chiniak, Alaska: magnitude 3.1 (January 23, 08:08 UTC)
• 22 km southeast of Kokhanok, Alaska: magnitude 2.6 (January 23, 07:14 UTC)
• 5 km southwest of Central Aguirre, Puerto Rico: magnitude 2.7 (January 23, 05:17 UTC)
• 145 km southeast of Sand Point, Alaska: magnitude 3.4 (January 23, 03:49 UTC)
• 70 km west of Ferndale, California: magnitude 2.7 (January 23, 01:53 UTC)
• 32 km south of Cantwell, Alaska: magnitude 3.2 (January 23, 00:39 UTC)
• 41 km southeast of Evanston, Wyoming: magnitude 3.0 (January 22, 18:22 UTC)
• 19 km northeast of Pedro Bay, Alaska: magnitude 2.6 (January 22, 17:59 UTC)
• 22 km northwest of Tatitlek, Alaska: magnitude 3.2 (January 22, 15:53 UTC)
• 20 km west of Clam Gulch, Alaska: magnitude 2.8 (January 22, 14:14 UTC)

Safety Measures for Earthquakes in the United States

Although it is impossible to predict exactly when an earthquake will occur in the United States, there are concrete actions that can minimize risks for the population. Pre-emptive preparation is essential, especially in high seismic activity zones or densely populated urban areas.

Preparation before an earthquake:

Advance planning includes creating a clear and safe evacuation plan that all household members know. It is recommended to prepare an emergency kit containing essential items: disinfectants, pain relievers, anti-inflammatories, various bandages, gauze, hydrogen peroxide, a thermal blanket, elastic bandages, and a whistle for signaling if trapped.

It is crucial to have a waterproof container or bag to store identification documents and other important legal papers. This emergency kit should be in an easily accessible and known location for all family members.

Actions during the seismic event:

When the earthquake alert sounds, it is critical to follow safety instructions immediately and proceed to evacuate the building in an orderly manner. For those on upper floors (above the third level) who cannot evacuate quickly, it is essential to know the designated safe zones within the building.

During the tremor, avoid approaching windows (to prevent glass breakage), stairs (which can become dangerous), elevators (which could trap you), and any objects that might fall due to movement. Staying calm is vital to act accurately under pressure.

Post-earthquake actions:

Once the seismic movement has ceased, it is important to continue following the instructions of authorities and emergency teams, who will verify structural damages in buildings and residential complexes before allowing re-entry.

Check on the well-being of all family members physically and emotionally as an immediate priority. Experts recommend avoiding saturating phone lines to keep channels open for emergency reports; instead, consider communication via text messages or other digital platforms that do not congest emergency communication infrastructure.

Understanding these protective measures against earthquakes in the United States is essential for anyone living in seismic zones, ensuring an effective response and safeguarding those facing these natural events.