LA12 shows many types of seismic grumbles. Some of the recent Central American earthquakes may have shown up on the helicorders. No statement by the officials or USGS on it.
Thanks David H. for the news tip – 😉
A reader, Rick sent in this screen shot from ANF of large Northern Hemisphere (N. Atlantic) earthquakes that may have affected the helicorders.
Big seismic activity shown on the helicorders. LA12 shows what’s happening.
The following helicorders are out of service: