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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 : #Actualités volcaniques

At Kilauea, high rates of seismicity and deformation are observed on the rift zone east of Pu'u O'o; this activity is related to a continuous magmatic intrusion of the East rift zone towards Highway 130.

The seismic activity lasted all day, before decreasing slightly since midnight in the area of ​​the Highway.

May 2 at the start of the day, a GPS station located 1.5 km SW. Nanawale Estates moved north. Cracks appeared in some roads, witnesses of the surface stress related to the intrusion.

Kilauea - seismic zone reviewed on 2 May 2018 / 15h - USGS Doc

Kilauea - seismic zone reviewed on 2 May 2018 / 15h - USGS Doc

Kilauea - seismicity in the East Rift Zone - Doc. USGS

Kilauea - seismicity in the East Rift Zone - Doc. USGS

Kilauea - deformation recorded by Sentinel 1 #InSAR between 19.04 and 01.05.2018 / 18h local, following the magmatic intrusion. The magma leaves the middle rift zone (Pu'u O'o) towards the low east rift zone - Doc. USGS

Kilauea - deformation recorded by Sentinel 1 #InSAR between 19.04 and 01.05.2018 / 18h local, following the magmatic intrusion. The magma leaves the middle rift zone (Pu'u O'o) towards the low east rift zone - Doc. USGS

A tilt meter experienced deflation, interspersed with periods of sudden inflation, in connection with the continuous episodic collapse of the Pu'u O'o floor, and ash plumes rising briefly from the crater.

The tiltmeters of the summit begin to record increasing deflation since the afternoon of May 2, the level of the lava lake has dropped about twenty meters.

The surface flows on the lava field 61 g ceased their advance on the 1st of May; it seems that the casting 61 g will no longer be fed by the Pu'u O'o lava.

 

Residents of Puna District must remain vigilant and follow the information on the state of the volcano. The Kalapana observation area is closed and under close surveillance.

 

Source: HVO - USGS

Pacaya - lava flows on a stormy background - photo Conred 02.05.2018

Pacaya - lava flows on a stormy background - photo Conred 02.05.2018

At Pacaya, strombolian explosions are accompanied by ejection of incandescent materials at 15-50 meters, and fallout at a distance between 2 and 3 km. The lava flows towards the northwest and the ancient crater of Cerro Chino about 500 meters.

Bluish-white degassing is observed between explosions, as well as nighttime glow.

Source: Insivumeh & Conred

Pacaya - 02.05.2018 - Strombolian activity and lava flows, with a storm in the background - photo Conred

Pacaya - 02.05.2018 - Strombolian activity and lava flows, with a storm in the background - photo Conred

Piton de la Fournaise - the Cassian crater surrounded by lava flows - photo 01.05.2018 Sebastien Conjero via Fournaise.info

Piton de la Fournaise - the Cassian crater surrounded by lava flows - photo 01.05.2018 Sebastien Conjero via Fournaise.info

At Piton de La Fournaise, the eruption started on April 27, 2018 at 11:50 pm local time continues. The intensity of the volcanic tremor (indicator of eruptive intensity at the surface) is still relatively stable.

A very slight deflation (deflation) of the volcano begins to be recorded on the OVPF deformation sensors. This means that the volume of magma coming out of the reservoir to feed the eruption is greater than the volume of magma that replenishes it. This parameter will be followed in the next few days.

Source OVPF

The Monthly Activity Bulletin is available by following this link.

Piton de La Fournaise - Evolution of the RSAM (indicator of the volcanic tremor and the intensity of the eruption) between 20:00 (16h UTC) on April 27th and 15h00 (11h00 UTC) on May 2nd on the seismic station of BOR (located at Mountain peak). (© OVPF / IPGP)

Piton de La Fournaise - Evolution of the RSAM (indicator of the volcanic tremor and the intensity of the eruption) between 20:00 (16h UTC) on April 27th and 15h00 (11h00 UTC) on May 2nd on the seismic station of BOR (located at Mountain peak). (© OVPF / IPGP)

At Karymsky, a moderate explosive activity continues, spotted by satellite.

A cloud of ash moves to the southeast for 36 km.

The aviation code remains orange, because of possible ash explosions that can rise to 5-6 km.

Source: KVERT 03,05,2018 / 01:39 Z

Karymsky - volcanic ash advisory 03.05.2018 / 01h55 - VAAC Tokyo

Karymsky - volcanic ash advisory 03.05.2018 / 01h55 - VAAC Tokyo

A sad anniversary: ​​Ten years ago, the eruption of Chaiten / southern Chile began. An article will be dedicated soon.

Anniversary of the Chaiten eruption in May 2008

Anniversary of the Chaiten eruption in May 2008

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