News from Suwanosejima, Nishinoshima, Villarica, Fuego and Hekla

.In the Ryukyu arc, the Mitake crater of Suwanosjima is still producing explosions.

The JMA noted an explosion on July 22 at 10:47 p.m., accompanied by a gray plume 1,200 meters above the edge of the crater.

A new explosion was reported on July 25 at 4:48 p.m., with a colored plume 1,000 meters above the crater, drifting north-east.

At 19:23, the ashes are still observed at 1,100 meters above the crater, north-east direction.

On July 26, the height of the plume was reported at 1,600 meters above the crater.

The activity is ongoing.

Source: JMA

The eruption continues on Nishinoshima with this July 25, 2020 at 3 p.m. a plume of brown ash at 4,400 meters above the crater, drifting north.

On the Nasa worldview satellite image, we can also see a discoloration of the water.

Sentinel-5P / Tropomi detected a strong sulfur dioxide signal near Nishinoshima, with 24.16DU of SO2 at an altitude of 8.12 km.

Sources: JMA, Nasa Worldview, Tropomi and VAAC Tokyo.

The Sernageomin reported this July 25 at 6:07 p.m. local the recording of an LP earthquake, associated with a moderate explosion in Villarica, accompanied by a slight displacement and infrasonic signal. Direct observation was not possible due to weather conditions.

The technical alert remains at Amarilla.

Source: Sernageomin

The Fuego continues its typical activity, this July 25, 2020, with moderate explosions at a rate of 8-12 per hour, accompanied by plumes at 4,700 meters asl., Dispersing over a west / north * west sector over 15 km.

During the night and in the morning, incandescent pulses are observed at 100-200 meters in height, as well as boulder avalanches in the barrancas Seca, Ceniza, Trinidad, Las Lajas and Honda, some of which reach the vegetation zone .

Ash particles are reported on Panimache, Morelia, Santa Sofia, el Porvenir, Palo verde and San Pedro Yepocapa.

Source: Insivumeh

Measurements made near the Hekla stratovolcano in Iceland indicate a build-up of magmatic pressure that has become considerably greater than during the volcano's last eruption in 1991 and 2000.

The University of Iceland's Institute of Earth Sciences, which carried out the measurements, warns that eruptions in Hekla usually occur suddenly and hikers near the volcano could be at risk if volcanic activity occurs .

"It cannot be guaranteed that people visiting the area can be warned in time to seek shelter before an eruption begins. It should also be noted that eruptions in Hekla often begin with a powerful phreatomagmatic eruption." , says the Institute. "If a group of unprepared hikers were near the eruption, they would have little way to escape."

The measurements were taken near the Næfurholt farm at the foot of Hekla where geologists found that the earth would heave when magma builds up under the volcano, and then fall back after the eruption.

Source: Icelandmonitor - Mount Hekla shows signs of strong magmatic pressure.