The seismic storm in the far western arm of the Brooks Range that began nearly two months ago continued early Monday morning.
The quake was located about 13 miles northeast of Noatak, at a depth of 15 miles.
A magnitude 4.2 shock preceded this morning’s larger quake by just one minute. The earthquake center said in online posting that it’s expecting numerous aftershocks with magnitudes up to four in the coming days.
The early-morning quake is the fifth such powerful shake since the earthquake swarm began April 18, with with two 5.7 magnitude earthquakes. Three more 5.7 temblors struck in early May and early June. In all, the larger quakes have been followed by more than 300 smaller aftershocks.
In May seismologists with the Earthquake Center installed field equipment in Noatak and Kotzebue to better monitor the activity.
Michael West, a seismologist and director of the Alaska Earthquake, said in early June that despite the new equipment, seismologists still don’t know what’s causing the powerful quake series. West said such earthquake swarms are usually seen near volcanoes, but with no volcanic activity in the region, there’s still no firm scientific consensus for what faults are causing earthquakes and other tectonic activity in that region of western Alaska.
- CBD was barely on people’s radar five years ago. Now, there’s no shortage of blog posts, promotional videos and local news stories extolling its benefits.
- With the uncertainty over Supreme Court nominee Brett Kavanaugh, Sen. Lisa Murkowski is again the focus of attention. As for his views on the legal status of Alaska Natives, she says they spoke and he allayed her concerns.
- A ballot initiative aimed at protecting salmon habitat is facing stiff opposition from industry groups, unions and Native corporations in Alaska. That opposition was on full display at an Anchorage hearing on the measure this week.
- The Alaska Mental Health Trust Authority has contracted a team of real estate experts to help decide what to do with a waterfront property it put up for sale more than two years ago. But the City and Borough of Juneau and would-be developers are losing patience.