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© Pixabay140 Earthquakes Detected On the Island of La Palma
The seismic swarms are being monitored by the Canary Islands Volcanological Institute (Involcan), that is operated by The Canary Islands Seismic Network. They have detected a new swarm of quakes below La Palma's Cumbre Vieja volcano.
As of around 4 am on Monday morning a grand total of 138 seismic events had already been detected. They have registered in at depths varying between 15 and 20 kilometres under the western slope the Cumbre Vieja volcano. The maximum magnitude that has been recorded so far has been 1.8 on the Richter scale.
According to Involcan both visitors to La Palma and local residents are not in any danger and should not be worried about the seismic swarm, as the depth of the earthquakes combined with the small magnitudes is not currently any cause for concern. What has been requested though is that the population keep aware of their environment and ensure they are fully aware of what to do if the volcanic activity starts to change.
Comment: According to a paper published in 2001, geological evidence suggests that a future eruption at Cumbre Vieja volcano could cause a catastrophic failure of its west flank and produce a 10-25m tsunami that would inundate the coast of Florida:
Cumbre Vieja Volcano -- Potential collapse and tsunami at La Palma, Canary IslandsSee also: Landslide induced mega-tsunami 'could happen at anytime' at Alaska's Barry Glacier
Abstract.
Geological evidence suggests that during a future eruption, Cumbre Vieja Volcano on the Island of La Palma may experience a catastrophic failure of its west flank, drop-ping 150 to 500 km3 of rock into the sea. Using a geologically reasonable estimate of landslide motion, we model tsunami waves produced by such a collapse. Waves generated by the run-out of a 500 km3 (150 km3) slide block at 100 m/s could transit the entire Atlantic Basin and arrive on the coasts of the Americas with 10-25 m (3-8 m) height.
[...]Authors:Figure 4. Evolution of the La Palma landslide tsunami from 2 minutes (a, upper left) to 9 hours (i, lower right). Red and blue con-tours cover elevated and depressed regions of the ocean respectively and the yellow dots and numbers sample the wave height,positive or negative, in meters. Note the strong influence of dispersion in spreading out an original impulse into a long series of waves of decreasing wavelength. See also that the peak amplitudes generally do not coincide with the first wave. Even after cross-ing the Atlantic, a lateral collapse of Cumbre Vieja volcano could impose a great sequence of waves of 10-25 m height on the shores of the Americas.
Steven N. Ward Institute of Geophysics and Planetary Physics, University of California, Santa Cruz California, USA
Simon DayBenfield Greig Hazard Research Centre, Department of Geological Sciences, University College, London, UK
Lava spewed from Italy's Mount Etna in a stunning site on Saturday night.
Mount Etna, located in Sicily, is Europe's most active volcano and one of three active volcanoes in Italy.
The site was secured as the volcanic activity was largely expected.
There were no reported injuries or deaths.
Etna is a popular tourist destination and its eruptions, especially when seen at night, are spectacular to watch.
© AFP / FILE PHOTO / MANILA BULLETIN
Julius Ceasar Sicat, DOST Region 3 director, told Bulacan Ronda Balita that they are closely monitoring the volcano with ongoing upgrades to the Pinatubo Volcano Network (PVN) and upcoming geochemical surveys of the Pinatubo crater lake and the condition of the volcano.
In an advisory, DOST-Philippine Institute of Volcanology and Seismology (Phivolcs) showed that since January this year, the PVN and the Philippine Seismic Network (PSN) have detected a total of 826 imperceptible earthquakes east-northeast of Mt. Pinatubo in the Mabalacat, Pampanga area.
They said that although there is no threat yet from the recent earthquake activities, the communities and local government units (LGUs) near the volcano were alerted against future earthquakes and volcanic hazards.
Mount Pinatubo erupted 29 years ago and killed hundreds of people. The volcano discharged millions of tons of sulfur dioxide into the atmosphere.
Hot volcanic material flowed for 1,500 meters (4,900 feet) down the slopes of Mount Merapi
There were no reports of casualties, but the Development Center kept the alert system at its second-highest level.
The explosion happened just as residents had begun to return to their nearby homes on the island of Java after fleeing previous eruptions.
The resulting lava flow was the biggest since authorities raised the danger level in November, Hanik Humaida of the local Volcanology and Geological Hazard Mitigation Center said.
© YouTube/Volcano Discovery (screen capture)
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© JMALarge amount of black dense ash emissions from Sakurajima volcano yesterday
Surveillance cameras observed a moderate vulcanian-type explosion at Minamidake crater producing an ash plume that reached up to estimated 7,000 ft (2,100 m) altitude and drifted SE.
The eruption that started at about 23:09 local time yesterday ejected glowing lava bombs as far as 600 m-900 m away from the crater. The explosion was also accompanied by volcanic lightning occurred in the beginning of the event.
Visible glow and near-constant emissions of gas suggest continued rise of fresh magma inside the volcano's conduits.
Volcanic and infrasonic tremors increased at 19:00 UTC on January 18, followed by an eruption at 19:15 UTC, with intense Strombolian activity and a new lava overflow from the Southeast Crater.
The front headed toward Valle del Bove and reached a height of about 2 900 m (9 500 feet). Intense Strombolian activity suddenly evolved into a weak lava fountain reaching maximum intensity at 20:30 UTC.
Merapi volcano
The Center for Volcanology and Geological Hazar Mitigation (PVMBG) said in a statement that lava flowed from the volcano 36 times within a period of six hours, descending up to 1,500 meters down its southwestern slope.
Authorities currently are not planning to bring back residents who had been evacuated earlier amid previous volcanic activity, warning people not to venture within five kilometers (3.1 miles) of the volcano which is now under "orange" alert status.
Comment: Lava spews from Italian volcano Mount Etna in series of explosions