We had an unusual HEPI trip (ETMX) just now. There doesn't seem to be much happening seismically except for some small wind gusts (not reaching 20mph). HEPI tripped as well as stage 1 of the ISI, but we are re isolated now and don't seem to have any problems.
We've just had another similar trip of ETMX HEPI, this time at the same time as a 40 moh gust of wind. The plotting tool didn't work.