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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

The OVPF confirms the opening of a new crack, at Piton de La Fournaise, upstream of the eruptive site, on the northwest flank of Piton Madoré.

This new crack was observed this morning by Sarah Mallet, a tourist, during a helicopter overflight (between 7:00 am and 8:00 am local time) ...

(note: doubly surprising, because of the location, and after as many days of eruption).

Piton de La Fournaise - opening of a new crack on the side of the Piton Madoré - photo Sarah Mallet / via Imazpress and other sites.

Piton de La Fournaise - opening of a new crack on the side of the Piton Madoré - photo Sarah Mallet / via Imazpress and other sites.

This new lava emission point was probably opened on March 5th (yesterday) between 9:00 am (local time, crack not present during the flight of an OVPF team) and before 7:00 pm (local time, time of day). acquisition of a satellite image on which an extremely weak signal can be detected at the level of the new crack (OI2 data, Clermont Auvergne University).

The 2 vents, and the flows on 06.03.2019 -photo S.Mallet / Imazpress


This morning, according to the photos and satellite images just provided, a small cone was already being formed and a new flow had begun to progress north of the main eruptive site. Due to the location of this new crack in the vicinity of the active vent since February 19 and associated low flow rates, its seismic signal coincides with that of the 19 February vent.

This new lava emission point testifies to maintaining pressure in the supply duct. We can not exclude the opening of new fissures upstream or downstream of the eruptive site in the coming days.

Alert level: Alert 2-2

Update : Following the opening of a new crack yesterday, new eruptive fissures opened this morning. 6 points of emission were visible this morning around the Piton Madoré. The OVPF will perform aerial reconnaissance as soon as weather conditions permit.

Sources:

- OVPF- newsletter 06/03/2019 - 6.30pm

Find all the information related to the Piton de la Fournaise activity on the different media of the OVPF-IPGP:
- the website (http://www.ipgp.fr/fr/ovpf/actualites-ovpf),
- the Twitter account (https://twitter.com/obsfournaise?lang=en),
- and the facebook account (https://www.facebook.com/ObsVolcanoPitonFournaise/)

- and Sarah Mallet / Imazpress
 

Piton de la Fournaise - 06.03.2019 / 15:39 UTC - Cascades Camera - from right to left, the two hot spots of the active vents, and below, the lava flow

Piton de la Fournaise - 06.03.2019 / 15:39 UTC - Cascades Camera - from right to left, the two hot spots of the active vents, and below, the lava flow

At Popocatépetl, in addition to the 97 exhalations of water vapor, gas and a little ash recorded during the last 24 hours, on March 6, two explosions were observed: the first at 8:27; the second at 17:56, accompanied by a plume with a low ash content that rises 2,500 meters above the crater, as well as fragments of fragments over 1 km on the slopes of a large eastern sector.

At the seismicity level, 61 minutes of LP sequences, 100 minutes of harmonic tremor and a VT earthquake were recorded.

Nighttime glow marks the crater.

This activity remains in the context of the amarillo alert Fase2

Source: Cenapred and L.F.Puente

Popocatépetl - explosion and plume of gas and ashes from 06.03.2019 / 17h 56 - photo L.F.Puente

Popocatépetl - explosion and plume of gas and ashes from 06.03.2019 / 17h 56 - photo L.F.Puente

Popocatépetl - explosion and plume of gas and ashes of 06.03.2019 / 17h 56 - Do not approach ! Risk zone - photo L.F.Puente

Popocatépetl - explosion and plume of gas and ashes of 06.03.2019 / 17h 56 - Do not approach ! Risk zone - photo L.F.Puente

At Merapi, on Java, the landslides of the dome continue with this March 7 two pyroclastic flows at 7:44 and 10:17 BST, respectively with a duration of 121 sec. And 97 sec. And a distance of 1,200 m. and 1,000 meters.

The level of activity remains unchanged and it is reminded to respect the safety distances.

Source: BPPTKG

Merapi - dome the 07.03.2019 / 7:45 - Doc.BPPTKG

Merapi - dome the 07.03.2019 / 7:45 - Doc.BPPTKG

Merapi - dome and pyroclastic flow 07.03.2019 / 10h17 - Doc.BPPTKG

Merapi - dome and pyroclastic flow 07.03.2019 / 10h17 - Doc.BPPTKG

In the Philippine archipelago, the activity of the Mayon is characterized on March 6 and 7 by a daily volcanic earthquake; on March 7th, nocturnal glow is observed, as well as a fall of rocks.

Networks of deformation measurements are still recording mid-slope inflation since June 2018.

The alert level remains at 2 / moderate instability.

Source: Phivolcs

The perfect profile of Mayon - amazing photo archive

The perfect profile of Mayon - amazing photo archive

In Papua New Guinea, the activity of Kadovar, which concerns a second major event since October 2018, is still sporadically noticed.

In February, images taken from a cruise ship show plumes of ashes emitted at regular intervals (Coral shipments on 07.02.2019 / 17:30, posted on 06.03 by Shérine France)

The Sentinel2 image of March 1, 2019 shows various incandescent points from the summit to the east flank, and some puffs of gas ... probable signs of intermittent activity in connection with the presence of a dome ?

Sources: Sentinel 2 and Coral expeditions via Shérine France

Kadovar - the 07.02.2019 / 17h30 - photo Coral expeditions, placed on line on 06.03.2019 by Shérine France

Kadovar - the 07.02.2019 / 17h30 - photo Coral expeditions, placed on line on 06.03.2019 by Shérine France

 Kadovar - image Sentinel-2 image bands 12,11,4 from 01.03.2019 - one click to enlarge

Kadovar - image Sentinel-2 image bands 12,11,4 from 01.03.2019 - one click to enlarge

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