An ash cloud from Shishaldin Volcano reaching 12 km (40 000 feet) above sea level was observed in satellite data at 13:50 UTC on October 3, 2023.
PHIVOLCS maintains Alert Level 3 over the Mayon volcano, which means that it is currently in a relatively high level of unrest, and hazardous eruption within weeks or even days could still be possible.
New activity/unrest was reported for 2 volcanoes from September 20 to 26, 2023. During the same period, ongoing activity was reported for 21 volcanoes.
A seismic swarm consisting of approximately 64 events, with magnitudes ranging up to 4.2, has been observed since 05:06 LT on September 26, 2023, in the Campi Flegrei region, Italy.
Increased volcanic activity was detected at the Villarrica volcano in Chile, starting on September 24, 2023, prompting officials to elevate the alert level to Orange. Evacuations have commenced in affected communes, and educational institutions have been temporarily closed.
An ash cloud from Alaska’s Shishaldin Volcano soared above 6 km (20 000 feet) above sea level at 13:24 UTC and up to 13.7 km (45 000 feet) by 14:18 UTC on September 25, 2023. The eruption, monitored through an array of sensors and satellite data, led authorities to elevate the Aviation Color Code to Red and the Volcano Alert Level to Warning.
A high-intensity explosion took place at Italy’s Stromboli volcano at 08:28 UTC on September 25, 2023.
New activity/unrest was reported for 2 volcanoes from September 13 to 19, 2023. During the same period, ongoing activity was reported for 21 volcanoes.
An eruption at submarine Ruby volcano, near the southern end of the Mariana arc, was detected on Thursday, September 14, 2023. This was based on seismoacoustic signals from a monitoring station in Saipan and satellite imagery that captured a submarine plume. The last known eruption at this volcano took place in 1995.
On September 15, 2023, around 01:10 UTC, an explosive eruption from Shishaldin Volcano sent an ash-rich cloud soaring to an altitude of 12.8 km (42 000 feet), accompanied by volcanic lightning. The eruption followed a several-hour increase in seismicity. The Aviation Color Code and Volcano Alert Level were raised to RED/WARNING.