Seismic activity has been at a slightly reduced level overnight, with the loss of tremor and hybrid activity. Rockfall signals dominate the records at present and have been at a relatively high level for several hours.
Rockfall activity has been noted on the eastern flank of the dome since first light; the larger rockfalls and some small pyroclastic flows are reaching the uppermost parts of the Tar River valley and associated small ash clouds are being blown westwards by the wind.
The new spurt of dome growth which has been ongoing since Christmas Day continues, and instability on this dome is causing the rockfalls to occur. Frequency and/or size of rockfalls may stay at this level or increase during the next few days so that areas downwind of the volcano will be affected by light ashfalls. Other areas outside of the Tar River valley and surrounding areas are not under immediate threat, although a rapid escalation in activity is possible and everyone should remain vigilant.