False Alarm: Second Earthquake Did Not Rattle San Diego County, USGS MSN | April 15, 2022 | Rafael Avitabile
A non-earthquake event triggered the USGS ShakeAlert system, which dozens of people across the county reported feeling, despite it not being an earthquake.
The U.S. Geological Survey (USGS) issued a statement via Twitter:
Hi everyone – #ShakeAlert detected a non-earthquake event which triggered our system. Fortunately, no public alerts were sent out. This is a bit of a first time for us because these events happen so rarely. Apologies for any confusion from our previous tweets.
― USGS ShakeAlert (@USGS_ShakeAlert) April 15, 2022
The USGS said they are investigating the cause of the non-earthquake event. . .
Straight Line of the Day: What could it have been?