Volcanic activity worldwide 25 Aug 2015: Santiaguito volcano, Piton de la Fournaise, Cotopaxi
Tue, 25 Aug 2015, 21:00
21:00 PM | 
Santiaguito's explosion yesterday morning
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)
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.
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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.
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Previous news
Mon, 24 Aug 2015, 15:51
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. ... read all
Sun, 23 Aug 2015, 21:00
Cotopaxi (Ecuador): Ash emissions have been increasing and producing plumes that rose 2 km above the summit and drifted west for over 50 km. ... read all
Sat, 22 Aug 2015, 21:00
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. ... read all
Fri, 21 Aug 2015, 11:23
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). ... read all
Wed, 19 Aug 2015, 21:00
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. ... read all
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