Low-frequency earthquakes detected in Alaska

Hundreds of earthquakes are detected in Alaska every week, but new research reveals some earthquakes are happening continuously and could encourage larger quakes.
Seismologists at the University of California Riverside looked at data from one area south and east of Dutch Harbor in the Alaska-Aleutian Subduction Zone.
They found more than 1,000 low-frequency earthquakes happened in a two-month time span, along with on-going tremors that last days to years.
Researchers say they move too slowly fo