Eruption at Etna and Manam - evolution of the Merapi dome.

At the top of Etna, the activity became paroxysmal on August 24, 2018 around 9:30 am, for one hour (Marco Neri).

A continuous emission of ash fed a plume that rose several hundred meters above the new southeastern crater.

Strombolian activity continued during the day - photos following this link - and during the night of 24 to 25, and to feed a lava flow.

Following this activity, the Mayor of Nicolosi issued an ordinance restricting public access to the volcano: it remains free up to 2,600 meters above sea level; between 2,600 and 2,750 meters, supported by an alpine guide or of a volcanologist. Etna becomes a forbidden zone above 2,750 meters.

Sources: Boris Behncke, Marco Neri, Gio Giusa, Etna Nord Guides, Nicolosi Town Hall

The Merapi remains on alert level 2; the summit remained visible on August 24 before being covered by fog.

The summit plume remains white, intense and thick, rising to about fifty meters.

The growth of the dome is continuing: its volume is estimated at 26,000 m³ on 24 August, with a growth rate of 2,600 m³ per day, considered as low.

Seismographs recorded e.a. 7 eruptive earthquakes and 3 emission earthquakes.

Sources: PVMBG & Magma Indonesia

A strong eruption occurred on August 25 at the Manam volcano in Papua New Guinea.

After some thermal anomalies identified by Mirova in recent days, the explosive eruption generated a dense plume of ash and pyroclasts, rising according to the first observations to more than 10,000 meters; he has darkened the ambient light for several hours.

The VAAC Darwin confirms the eruption and has defined a red aviation code; no notice of ash dispersion was possible.

VA ADVISORY / VAAC Darwin
DTG: 20180825 / 0430Z
VAAC: DARWIN
VOLCANO: MANAM 251020
PSN: S0405 E14502
AREA: PAPUA NEW GUINEA
SUMMIT ELEV: 1807M
ADVISORY NR: 2018/11
SOURCE INFO: HIMAWARI-8, GROUND REPORT
AVIATION COLOR CODE: RED
ERUPTION DETAILS: VA TO FL500, LAST OBS AT 25 / 0330Z.

Sources: Scott Waide, Sentinel2, Mirova and VAAC Darwin