Asked whether a source of energy triggered that large-tremor warning, the USGS said it was "looking into it."
There were no reports of any damages or injuries.
https://www.msn.com/
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