Pavlov (Alaska Peninsula, USA): The low-level eruption of the volcano has escalated, the Alaska Volcano Observatory reports: “Seismic tremor increased starting about 2300 UTC yesterday and pilots have recently reported ash clouds to 22,000 ft. ASL. Recent satellite images show a plume extending over 80 km east of the volcano.” (AVO)
A large thermal hot spot indicates the presence of fresh lava flows on the flanks of the volcano.
Popocatépetl (Central Mexico): The number of emissions of steam, gas and occasionally fine ash increased during 1-2 June. CENAPRED also recorded several episodes of weak harmonic tremor, consistent with continuing slow arrival of magma at the summit crater.
At 08:08 and 08:28 local time yesterday, two medium sized exhalations occurred, which were accompanied by emissions of fine ash. This started a train of small to medium sized emissions that produced a continuous plume of gases and fine ash headed towards the WSW.
Santa María / Santiaguito (Guatemala): Ongoing heavy rainfalls continue to trigger strong lahars, particularly through the Nimá I and San Isidro rivers.
More at Volcano Discovery: Volcanoes Today, 3 Jun 2014: Pavlov, Santa María / Santiaguito, Popocatépetl