A swarm of small shallow earthquakes has been occurring today in an area 2-3 miles northwest of the summit caldera, near the Highway 11.
So far, almost 60 quakes of magnitudes between 1.7 and 3.0 have been recorded by USGS, at shallow depths mostly around 0.8-3.9 km (0.5-2.4 miles).
The largest tremor, a magnitude 3.0 quake 9 Km WSW at 1.43 am local time, was felt by some residents of Volcano village.
Whether the quakes are related to magmatic processes or are purely tectonic in origin is unclear. USGS has not yet commented on the events.
Meanwhile another earthquake swarm is currently rattling Iceland: