Reawakening Redoubt?

A new earthquake swarm has started near the summit of Redoubt in Alaska - does this mean an eruption will soon follow?


The steam plume from the new dome on Redoubt, taken in January 2010. Image courtesy of USGS/AVO, taken by Dennis Anderson.


News comes out of Alaska that a small earthquake swarm has begun under Redoubt. This is the second such swarm since the volcano's 2009 activity ceased. Most of the seismicity appears to be near the summit of the volcano, which would suggest that magma might be moving underneath the new dome that is still steaming.

AVO describes the unrest:

"This morning, at roughly 01:44 AKDT (0944 UTC) a series of small repetitive earthquakes began occurring in the vicinity of the volcano's summit."

If new magma is rising, we might expect to see some phreatic explosions, following by ash plumes and/or a collapse of the new dome producing pyroclastic flows. AVO has returned Redoubt to "Yellow" status, meaning the volcano is showing signs of unrest. I'll post more details when they come.

{Hat tip to Randall Nix for bringing the swarm to my attention.}

Related Articles

To save us, half of Earth needs to be given to animals

We're more dependent on them than we realize.

(Photo Lily on Unsplash)
Surprising Science
  • Scientists says our survival depends on biodiversity.
  • A natural climate strategy we often forget.
  • Seeing our place among the Earth's living creatures.
Keep reading Show less

New infographics show how cigarette smokers are socially penalized

There's a high social cost that comes with lighting up.

(Porch)
Sex & Relationships
  • The home improvement company Porch recently polled 1,009 people on their feelings about smoking.
  • The company recently published the results as infographics.
  • In terms of dating, 80 percent of nonsmokers find the habit a turnoff
Keep reading Show less

The "catch" to being on the keto diet

While short-term results are positive, there is mounting evidence against staying in ketosis for too long.

Brendan Hoffman / Getty
Surprising Science
  • Recent studies showed volunteers lost equal or more weight on high-carb, calorie-restricted diets than low-carb, calorie restricted diets.
  • There might be positive benefits to short-term usage of a ketogenic diet.
  • One dietician warns that the ketogenic diet could put diabetics at risk for diabetic ketoacidosis.
Keep reading Show less