'Basyang' may spare Albay but Mayon threat remains | BICOL TODAY

‘Basyang’ may spare Albay but Mayon threat remains

Photo from Al Francis Bichara FB

By Connie Calipay

LEGAZPI CITY — Albayanos may be saved from the direct threat of Tropical Storm “Basyang” that could worsen the present abnormal behavior of Mayon Volcano, which is still under Alert Level 4 status.

Melvin Almuela, weather specialist of the Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGSA), in a press briefing Monday said “Basyang” has slightly accelerated while moving closer towards Eastern Mindanao and it will be closest to Albay tomorrow, Feb. 13.

“Today, Monday, tropical storm “Basyang” is affecting Bicol region with cloudy skies with rain showers and thunderstorm,” he added.

Earlier, Albayanos expressed fear over the threat of Basyang hitting the province, which might cause lahar flows from Mount Mayon.

Ed Laguerta of the Philippine Institute of Volcanology and Seismology (Phivolcs) said the occurrence of lahar flow is possible if there will be strong and sustained rains.

He stressed the importance of constant monitoring of the activities of Mayon – both physically and through the agency’s various instruments.

Monitoring, he added, should be on the geophysical, geochemical and geodetic aspects of the volcano.

Laguerta said the geophysical aspect refers to the movement of the magma inside the volcano.

The geochemical concern involves the volume of sulphur dioxide being emitted by the volcano.

When it comes to the geodetic aspect, the ground condition is being monitored as to whether there has been deformation.

Phivolcs has recorded 82.1 million cubic meters of ejected ashes, lava, rocks and pyroclastic materials from the crater of Mayon Volcano since day one of eruption on Jan. 13.

Laguerta said based on their latest aerial survey, Mayon Volcano is still inflated which indicates that materials below the ground are still generating.

Based on bulletin, Mayon’s activity in the past 24 hours was characterized by sporadic and weak lava fountaining, lava flow and degassing from the summit crater. Discrete episodes of lava fountaining lasted four to 20 minutes.

Incandescent lava fountains 150 meters tall generated steam-laden plumes that rose up to 400 meters from the summit before drifting northwest and west northwest.

Throughout the night on Sunday, lava flows and consequent incandescent rockfalls were observed in the Miisi and Bonga-Buyuan channels.

Effused volumes of incandescent lava flows have advanced to 3.3 kilometers, 4.5 kilometers and 900 meters down the Miisi, Bonga and Basud Gullies, respectively, from the summit crater.

Pyroclastic density currents (PDCs) have deposited to the 4.6, 4.5 and 4.2 kilometer reaches of the Miisi, Bonga and Basud Gullies, respectively.
A total of 92 volcanic earthquakes, most of which corresponded to lava fountaining events were recorded by Mayon’s seismic monitoring network.

Electronic tilt and continuous GPS still record sustained swelling or inflation of the edifice since November and October 2017, consistent with pressurization by magmatic intrusion.

Alert Level 4 remains in effect over Mayon Volcano. (PNA)

Posted by on February 13, 2018. Filed under Bicol News,Headlines. You can follow any responses to this entry through the RSS 2.0. You can leave a response or trackback to this entry

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