M4.9 Earthquake Strikes Offshore Near Nikolski, Alaska

A magnitude 4.9 earthquake struck 81 kilometers (about 50 miles) southwest of Nikolski, Alaska, at a depth of roughly 35 kilometers, according to the USGS. The quake occurred in the Aleutian Islands region, one of the most seismically active areas in the United States.

Nikolski is a small community on Umnak Island with a population of only a few dozen residents, so the number of people who felt strong shaking is likely limited. Light to moderate shaking may have been noticed on Umnak Island and possibly in other nearby Aleutian communities, but at this magnitude and distance, significant damage is not expected. There have been no initial reports of injuries or structural damage.

What to watch for

Aftershocks: Smaller earthquakes commonly follow a quake of this size, sometimes for days. Most will be weaker than the main shock, but occasional stronger aftershocks are possible.

Tsunami status: At magnitude 4.9, this earthquake is well below the threshold typically associated with tsunami generation. No tsunami warning, advisory, or watch has been issued for this event.

Basic readiness: If you live in the Aleutians or coastal Alaska, this is a good reminder to secure heavy furniture, know your drop-cover-hold routine, and keep an emergency kit accessible. Quakes of this size are routine in the region, but larger ones are always possible.

Residents who felt the shaking can report it to the USGS ‘Did You Feel It?’ program, which helps scientists map how earthquakes are experienced across a region.

Earthquake data for this alert comes from the U.S. Geological Survey (USGS).

Frequently Asked Questions

Was this earthquake felt in Nikolski or other towns?
Light to moderate shaking was likely felt on Umnak Island, including Nikolski, about 81 km from the epicenter. Because the area is sparsely populated, few people were in a position to feel it strongly.

Is a tsunami possible from this quake?
No. At magnitude 4.9, this earthquake is far too small to generate a dangerous tsunami, and no tsunami alert has been issued.

Should I expect aftershocks?
Yes, aftershocks are normal after a quake of this size and can continue for days. They are usually smaller than the main shock.

Is this earthquake unusual for Alaska?
Not at all. The Aleutian Islands sit on an active subduction zone, and earthquakes of this magnitude occur there regularly, often several times a month.

Keep tracking this: the Space Weather Command Center shows live storm levels, aurora visibility and active alerts in plain English, and the Event Database is a searchable log of every earthquake, solar flare, CME and geomagnetic storm we’ve tracked, free to search or download.

Source: USGS

Related Reading

• Earthquake Survival: Precautions, Kit & Early Warning in 2026
• Analyzing Low-Radiation Nuclear Explosions: Tactical Assessments and Survival Strategies

Map centered on the epicenter (52.35, -169.56). Map data © OpenStreetMap contributors.

Sky & Solar Conditions at the Time

Moon: Last Quarter (59% illuminated), in Taurus.

Notable planetary angles: Jupiter trine Saturn (121°), Mars square Saturn (91°), Mercury sextile Mars (62°), Sun sextile Mars (56°).

Concurrent space weather: planetary Kp index 1.3; strongest recent solar flare: nothing notable.

This is a factual snapshot, not a claim of cause and effect – researchers are divided on whether lunar, planetary or solar factors influence seismic or weather activity. It’s included so readers can track the pattern for themselves over time.

Earthquakes Within ~400 km, Past 30 Days

For context, here is other recent seismic activity in the surrounding region (M2.5+, via USGS):

Emergency number for Alaska: 911 (General guidance – always verify locally, as this can vary by region.)