Taal, seen from Picnic Grove Theme Park / Tagaytay City - emission of a gas and steam plume on 26.01.2020 in the morning - photo Richard Langford
Activity in the main Taal crater in the Philippines over the past 24 hours has been characterized by low to large emissions of white to dirty white plumes laden with steam, 100 to 800 meters high, which have drifted towards the southwest. Sulfur dioxide (SO2) emissions were lower than instrumental detection.
The Philippine Seismic Network (PSN) has plotted a total of seven hundred fifty-five (755) volcanic earthquakes since 1:00 p.m. on January 12, 2020.
In the past 24 hours, the Taal volcano network, which can record small earthquakes undetectable by the NHP, has recorded ninety-two (92) volcanic earthquakes, including four (4) low-frequency events . These earthquakes signify magmatic activity under the Taal building which could lead to eruptive activity at the main crater.
Small thermal anomalies are reported by Mirova, between 1 and 17 MW for the period 25-27 January 2020
Alert level 3 is maintained on the Taal volcano. DOST-PHIVOLCS recommends that entry to the island of the Taal volcano as well as to the areas on Lake Taal and the communities to the west of the island within a radius of seven (7) km from the main crater must be strictly prohibited.
Source: Phivolcs & Mirova
In Popocatépetl, 73 exhalations composed of water vapor, volcanic gases and a low ash content have been counted in the last 24 hours. Meanwhile, vapor emissions, volcanic gases and a low ash content have been observed, which the wind preferentially disperses towards the east-northeast. In addition, 357 minutes of tremors were recorded, and small episodes of nocturnal glowing.
A small explosion on January 27 around 11:20 p.m. ejected pyroclasts at close range, and was accompanied by an ash plume at 600 m. in height, dissipating towards the northeast.
Small ash falls are reported on San Nicolás de los Ranchos.
The alert level remains at amarillo Fase 2
Sources: Cenapred and webcams from Mexico
In the Reykjanes peninsula, the seismic swarm continues. The largest earthquakes were M3.7 and M3.6 on January 22 and> M3 on January 27.
The aviation code is yellow.
The Reykjanes volcanic system was moderately active with the last eruption in 1240 CE. It is approximately 45 km long and 5 to 15 km wide, with a SW-NE tendency. Its northern part merges with the Svartsengi volcanic system while the most southerly 9 km are below sea level. During the Holocene, more than 15 eruptions occurred (VEI 1-3), producing basalts and characterized by lava flows on land and offshore Overseas explosive activity.
The Svartsengi volcanic system showed activity similar to that of Reykjanes with the last eruption around 1240 CE. The system is at least 30 km long and 7 km wide. Activity during the Holocene was effusive, producing lava flows.
The history of the Holocene eruptions of the volcanic systems of Svartsengi and Reykjanes seems to be similar; In light of the geological similarities between Reykjanes and Svartsengi, the systems are described together.
Sources: IMO and Icelandic volcanoes.