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Volcanic activity worldwide 25 Aug 2015: Santiaguito volcano, Piton de la Fournaise, Cotopaxi

Dienstag Aug 25, 2015 21:00 |

Santiaguito's explosion yesterday morning
Santiaguito's explosion yesterday morning
Ash emissions from Cotopaxi yesterday (photo: Patricia Mothes / IGEPN)
Ash emissions from Cotopaxi yesterday (photo: Patricia Mothes / IGEPN)
Tremor amplitude of Piton de la Fournaise during the first 12 hours of the eruption (OVPF)
Tremor amplitude of Piton de la Fournaise during the first 12 hours of the eruption (OVPF)
Santiaguito (Guatemala): (25 Aug) A stronger than usual explosion occurred yesterday morning at 08:43 local time, producing a plume that rose approx. 2 km above the lava dome and generated small pyroclastic flows.
INSIVUMEH reported that the lava flow to the east side of the dome remains weakly active, generating small avalanches.

Cotopaxi (Ecuador): The eruption continues with similar activity as during the past days, with a gradually increasing trend. Accompanied by near-continuous tremor, the volcano now produces almost constant, dense ash plumes rising up to 2 km and drifting into westerly directions, reaching the Pacific Ocean.
The current phase of near-continuous emissions started during the night 22-23 Aug, when volcanic tremor appeared suddenly at 21:41 local time. The next day, after 18 hours, 2 mm of new brown ash fall had accumulated on the western side in the Cotopaxi National Park.
... [read more]

Piton de la Fournaise (La Réunion): The eruption that started yesterday continues, but only one of several fissures (east of the Rivals crater), that opened last night remains active over a length of 100 m. A small cone has been built at its upper end, approx. 140 m east of Rivals crater. Strombolian activity occurs from this vent, while 3 other vents lower on the fissure continue to produce lava fountains and feed a lava flow that slowly advances towards the Grandes Pentes.
The volcano observatory reports that both tremor and lava effusion rates have been dropping, first rapidly after the first, most intense two hours last night and more slowly since.
... [read more]
Vorherige Nachrichten

Montag, Aug 24, 2015
Aso (Kyushu): Activity has been low during the past days, with only intense steaming and dilute ash emissions from the Nakadake crater. Incandescence continues to be visible from the main vent, suggesting magma remains close to the surface. ... [mehr]
Ash plume from Cotopaxi seen from Quito yesterday (Image: Ministerio Coordinador de Seguridad)
Sonntag, Aug 23, 2015
Cotopaxi (Ecuador): Ash emissions have been increasing and producing plumes that rose 2 km above the summit and drifted west for over 50 km. ... [mehr]
The blocked Showa crater of Sakurajima (image: Asahi Shimbun)
Samstag, Aug 22, 2015
Sakurajima (Kyushu, Japan): (21 Aug) According to Japanese scientists, the scenario of a major eruption at the volcano is becoming more and more likely. The Asahi Shimbun news agency sent a drone to photograph the crater, confirming that a flat dome is currently blocking the conduit. ... [mehr]
Ash emission from Etna's Voragine (photo: Boris Behncke / twitter)
Freitag, Aug 21, 2015
Etna (Sicily, Italy): Etna has been mostly calm during the past months. However, signs of unrest have appeared in the form of dilute ash emissions from the central crater (Voragine). ... [mehr]
Inferometry map of Sakurajima showing large deformation (inflation) of the summit area
Mittwoch, Aug 19, 2015
Sakurajima (Kyushu, Japan): The most recent radar measurements done by ALOS-2 satellite of the Japan Aerospace Exploration Agency (JAXA) show that the summit of the volcano has inflated by the enormous amount of approx. 16 cm during the interval 4 Jan - 17 August this year. ... [mehr]

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