Four hundred miles from the epicenter, at 1:30 in the morning, many in Fairbanks did not feel the earthquake at all. For those who did, it lasted for a long time and came as two distinct, widely separated shocks.
The recent nuclear test in North Korea presents a quandary for seismologists. The political posturing and global tension these events create is significant. And yet scientifically, they are fascinating.
As we head into winter, seismic events generated by glaciers—so-called icequakes—have quieted down for the season. Each year, hundreds of these icequakes are large enough to be caught by our standard earthquake detection routines.