Another phase of intense activity is occurring at the volcano at the time of this update.
The AVO reported continuing low-level ash emissions to about 15,000 ft (6 km) dissipating E-NE, detected in a satellite image.
This founds in a four-hour elevated tremor and increase in surface temperatures as a precursor of the eruptive stage. Explosion signals have been detected in infrasound data at 02:00 local time.
The AVO continues: „The National Weather Service has issued a SIGMET for this ash cloud, and a Marine Weather Statement has been issued for possible trace ash on marine waters NE of the volcano.“
Based on previous eruption series, minor ash emissions are expected to occur and may increase over the next couple of hours. Pyroclastic flows and lahars (mud-flows) are expected as well.
The last four eruptive events generated ash columns reaching elevations up to 40,000 ft (12 km). These eruptions may occur with little or no warning.
Source: Alaska Volcano Observatory volcano activity update 26 July 2023