Explosive activity continues at Etna volcano, Italy

Explosive activity continues at Etna's summit craters with strong degassing and rare ash emissions.

Photos below were taken around 16:00 UTC on October 21 from the Taormina. They show emissions of ash from the Southeast Crater to the right, puffs of ash from the center and strong degassing from the New Southeast Crater.

Etna on October 21, 2019. Credit: INGV

Etna on October 21, 2019. Credit: INGV

Geological summary

Mount Etna, towering above Catania, Sicily's second-largest city, has one of the world's longest documented records of historical volcanism, dating back to 1500 BCE. Historical lava flows of basaltic composition cover much of the surface of this massive volcano, whose edifice is the highest and most voluminous in Italy.

The Mongibello stratovolcano, truncated by several small calderas, was constructed during the late Pleistocene and Holocene over an older shield volcano. The most prominent morphological feature of Etna is the Valle del Bove, a 5 x 10 km (5.1 x 6.2 miles) horseshoe-shaped caldera open to the east.

Two styles of eruptive activity typically occur at Etna. Persistent explosive eruptions, sometimes with minor lava emissions, take place from one or more of the three prominent summit craters, the Central Crater, NE Crater, and SE Crater (the latter formed in 1978). Flank vents, typically with higher effusion rates, are less frequently active and originate from fissures that open progressively downward from near the summit (usually accompanied by strombolian eruptions at the upper end).

Cinder cones are commonly constructed over the vents of lower-flank lava flows. Lava flows extend to the foot of the volcano on all sides and have reached the sea over a broad area on the SE flank. (GVP)

Featured image credit: INGV


Shallow M6.1 earthquake hits Tonga

November 12, 2019

A shallow earthquake registered by the USGS as M6.1 hit Tonga at 23:03 UTC on November 11, 2019, at a depth of 10 km (6.2 miles). EMSC is reporting it as M5.9 The epicenter was located 147 km (91 miles) W of Neiafu and 251 km (156 miles) N of Nuku'alofa, Tonga....

Unusually strong M5.4 earthquake hits France, injuring 4 peeople

November 11, 2019

A shallow earthquake registered by the BCSF as M5.4 hit near Montelimar, France at 10:52 UTC (11:52 LT) on November 11, 2019. The agency is reporting a depth of 12 km (7.4 miles). USGS registered it as M4.8, EMSC as M4.9. The epicenter was located 5.1 km (3.2 miles)...

Very deep M6.5 earthquake hits south of Fiji islands

November 08, 2019

A very deep earthquake registered by the USGS as M6.5 hit south of Fiji islands at 10:44 UTC on November 8, 2019. The agency is reporting a depth of 582.9 km (366 miles). EMSC is reporting the same magnitude and depth. The epicenter was located 451 km (280 miles)...

Shallow M6.3 earthquake hits east of the South Sandwich Islands

November 05, 2019

A strong and shallow earthquake registered by the USGS as M6.3 hit east of the South Sandwich Islands at 20:52 UTC on November 5, 2019. The agency is reporting a depth of 10 km (6.2 miles). The quake comes 3 days after M6.1 earthquake 106 km (66 miles) NNE of...

Strong and shallow M6.6 earthquake hits Tonga

November 04, 2019

A strong and shallow earthquake registered by the USGS as M6.6 hit Tonga at 22:43 UTC on November 4, 2019. The agency is reporting a depth of 13.4 km (8.3 miles). The quake hit 53 minutes after M6.1 (CSN; M6.0 USGS) near the coast of Coquimbo, Chile. It was followed...


Comments

No comments yet. Why don't you post the first comment?

Post a comment

Your name: *

Your email address: *

Comment text: *

The image that appears on your comment is your Gravatar