The most impactful earthquake in Alaska since the 1964 M9.2 Great Alaska Earthquake occurred on Friday, November 30, 2018 at 8:29 a.m. The magnitude was originally reported as a magnitude 7.0 but was revised to M7.1 on March 8, 2019.

The earthquake caused power outages, damage to roads and buildings, and closures of schools, businesses and government offices. While there were no fatalities, there were several cases of nonlife-threatening injuries.

The scientific and societal impacts of this event are far-reaching.

Ground motion visualization for the first hour after the earthquake shows seven major aftershocks and many, many additional smaller ones on the stations near the epicenter. At one of our closest stations near Susitna (the circle just to the left of the red star), the intense shaking caused the sensor mass to became stuck off-scale and had to be electronically re-centered by our staff at around 9:20 a.m.