Volcanos

Roundup of Global Volcanic Activity

Popocatépetl (Central Mexico): Activity has remained essentially unchanged. Intermittent small to moderate explosions occur from the volcano's summit crater, where slow magma extrusion continues to accumulate in a moderately viscous, flat dome. An aerial survey on 10 April showed that the most recent dome seen in February (numbered 55) had partially collapsed, as a result of the explosions during late March to early April. Its remaining mass occupying the inner crater was flat and had developed a series of concentric fissures.

Reventador (Ecuador): Activity has been relatively intense during the past days. Frequent explosions with ash plumes of 1-2 km height and smaller pyroclastic flows have occurred from the summit vent, where a lava dome is growing.

Tungurahua (Ecuador): Intermittent mild explosive activity with ash emissions continues at the volcano. An unusual seismic swarm occurred during the night of 9-10 April, following two volcanic earthquakes at 6 km depth in the evening. More than 1300 quakes were recorded until noon of 10 April. What made it unusual was that the seismic events were of the "drumbeat" type, not seen on Tungurahua during the past 16 years, but thought to correspond to the ascent of viscous magma.

Etna (Sicily, Italy): A short sequence of seismo volcanic events occurred a few hours ago ended with two ash explosions at the Bocca Nuova Crater.