Five minutes later, user Solarwatcher posted this:
GEOMAGNETIC SUDDEN IMPULSE ALERT:
A Geomagnetic Sudden Impulse measuring 58nT was detected at 11:05 UTC. Geomagnetic Storm expected inside the next 4-6 hours.
All indications are that it’s starting to hit now, and will probably continue for a large part of the day.
Also, the RSOE lists a couple of 5.1s in Vanuatu early this morning.