Dec. 17, 2025
The World’s Geophysicists Gather
What’s Shaking Alaska?!
Here is your weekly seismic update from the Alaska Earthquake Center for the week of December 17, 2025, where earthquake activity is monitored 24 hours a day.
Over the past week, Alaska recorded about 1,300 earthquakes. Around 1,000 of these were aftershocks from the powerful magnitude 7.0 Hubbard Glacier earthquake that struck on December 6.
Also Read: What’s Shaking Alaska?Weekly Earthquake Summary (December 10, 2025)
Scientists say these aftershocks are now slowly decreasing in number and strength, which is normal after a large earthquake. Most of the recent aftershocks have been small, generally around magnitude 2.
The largest earthquake this week was a magnitude 5.6 event in the western Aleutian Islands. In total, 10 earthquakes were reported to have been felt by residents.
Earth Scientists Focus on Alaska
This week, more than 25,000 geophysicists from around the world are meeting at the annual American Geophysical Union (AGU) conference to share new research.
Out of nearly 20,000 scientific presentations, almost 700 focus on Alaska, highlighting the state’s importance in earthquake and tsunami research.
Topics include improving offshore earthquake detection, studying early warning systems, understanding how tsunamis form, and exploring links between permafrost thaw and landslides.
Scientists from the Alaska Earthquake Center are actively involved in this research and continue to share significant findings with the public. More information and updates are available at earthquake.alaska.edu.
