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Earth of fire

Actualité volcanique, Articles de fond sur étude de volcan, tectonique, récits et photos de voyage

Publié le par Bernard Duyck
Publié dans : #volcanic activity
Manam - hot spots on 24.06.2019 - Sentinel image 2 bands 12,11,4 - one click to enlarge

Manam - hot spots on 24.06.2019 - Sentinel image 2 bands 12,11,4 - one click to enlarge

VAAC Darwin issued a Volcanic ash  advisory for Manam, Papua New Guinea, following continuous ash emissions up to a flying altitude 500 (about 15,000 m.) moving westward, based on Himawari 8 images.

The ash cloud extends over the Indonesian territory.

The aviation code is red.

Thermal anomalies, moderate to high, have been reported by Mirova since June 20th.

VA ADVISORY
DTG: 20190628 / 0430Z
VAAC: DARWIN
VOLCANO: MANAM 251020
PSN: S0405 E14502
AREA: PAPUA NEW GUINEA
SUMMIT ELEV: 1807M
ADVISORY NR: 2019/82
SOURCE INFO: HIMAWARI-8, RVO
AVIATION COLOR CODE: RED
ERUPTION DETAILS: CONTINUOUS VA EMISSION TO FL500 MOV SW. (15.000m)
OBS VA DTG: 28 / 0430Z
OBS VA CLD: SFC / FL500 S0406 E14510 - S0521 E14433 - S0638
E14426 - S0610 E14213 - S0443 E14232 - S0341 E14324 - S0352
E14502 MOV SW 25KT

CURRENT SATELLITE IMAGERY INDICATE ONGOING ERUPTION TO
FL500. VA HEIGHT AND MOVEMENT BASED ON HIMAWARI-8 IMAGERY

 

Sources: Mirova, VAAC Darwin and flightradar

Manam - thermal anomalies / Mirova and Volcanic Ash advisory / VAAC Darwin at 28.06.2019
Manam - thermal anomalies / Mirova and Volcanic Ash advisory / VAAC Darwin at 28.06.2019

Manam - thermal anomalies / Mirova and Volcanic Ash advisory / VAAC Darwin at 28.06.2019

On June 25, 2019 at 23:03 GMT (01:03 local time), the Stromboli geophysical monitoring network recorded a very strong explosive event, associated with geophysical parameters and sound pressure, over ordinary explosive activity and classifiable as a major explosive event.

 Stromboli - Explosive event of 25.06.2019, taken by the thermal camera of Roccette (ROC)

 Stromboli - Explosive event of 25.06.2019, taken by the thermal camera of Roccette (ROC)

The seismic event (2.7 x 10 -4 m / s in speed and 4.4 x 10 -5 in displacement) exceeds four times the values ​​of ordinary activity.

The infrasonic network indicates that the explosion generated pressures of approximately 170 Pa at a distance of 450 m and located the explosive event in the area related to Crater C.

This event was accompanied by a strong signal of soil deformation (0.6 μrad for the OHO inclinometer and 2 μrad for the EPA inclinometer) preceded by a swelling of the soil of a little more than one minute

The explosive event is clearly visible from the images of the ROC thermal camera and the visible LBZ camera. According to the images, there is an important emission of material on the terrace of the crater, also confirmed by the map of the fallout of tephra, which reached the Forgia Vecchia where they caused a fire.

 

Source: LGS / Laboratorio Geofisica Sperimentale and Weekly Activity Newsletter of Stromboli Volcano (June 21-27) of the Experimental Geophysical Laboratory (Lgs) - Department of Earth Sciences, University of Florence.

Stromboli - 25.06.2019 / 23h59 - seismo-acoustic recording and tiltmeter - Doc.LGS
Stromboli - 25.06.2019 / 23h59 - seismo-acoustic recording and tiltmeter - Doc.LGS

Stromboli - 25.06.2019 / 23h59 - seismo-acoustic recording and tiltmeter - Doc.LGS

The Instituto Geofisico del Perú informs that the volcano Ubinas has begun a new eruptive process.

Eighty earthquakes related to the movements of volcanic fluids (water vapor, gas and magma), and 150 earthquakes / day, associated with the rupture of rocks were recorded between June 21st and 24th, 2019.

On June 24, ash and gas emissions were observed, dispersing to the north and northeast of the crater.

No significant deformation is noticed, nor thermal anomalies; SO2 levels show no change.

The IGP recommends that the authorities move from the alert level from green to yellow.

 

Source: IGP

Ubinas - IGP webcam images from 24.06.2019 / 10h56

Ubinas - IGP webcam images from 24.06.2019 / 10h56

On June 21, 2019, an avalanche of flank marked the Red Glacier on the Iliamna volcano, located in Alaska in the Cook inlet. It has been detected by the seismic network and the pressure signals.

The event, which has not occurred since November 2013, was followed in the 12 hours by small, repetitive, glacial earthquakes.

The volcanic alert remains normal and the aviation code green; although steam plumes occur on its eastern flank, Iliamna has not exhibited historical volcanic activity.

Source: AVO

Iliamna - Flank avalanche of 21.06.2019 - photo 25.06.2019 Johnson Greg / AVO

Iliamna - Flank avalanche of 21.06.2019 - photo 25.06.2019 Johnson Greg / AVO

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