The volcano has continued to be relatively quiet during the last 24 hours, with some rockfalls and long-period earthquakes. Low cloud has restricted views of the top of the dome.
The broadband seismic network recorded a total of 60 rockfall signals during the past 24 hours, a decrease since yesterday and far fewer than were recorded last week. There were 23 long-period earthquakes, about the same amount as yesterday. The level of long-period seismicity has been quite high since the middle of March. Once again, there were no hybrid or volcano-tectonic earthquakes recorded today. This style of seismicity has dominated for the past 2 weeks, and is associated with continued moderate dome growth.
Visibility was poor today, and no views of the dome were possible.
A visit was made to Chance's Peak this morning to retrieve the GPS equipment which had been running overnight. The equipment was placed on the crater wall at Farrell's by helicopter this afternoon, and will be collected tomorrow. The purpose of these measurements is to determine the rate of deformation of the crater area.
The volcano remains dangerous, and only essential visits should be made to the evacuated zone. People should wear masks when in the ashy areas. The Tar River and White River valleys are extremely dangerous, and should not be entered under any circumstances.