PHIVOLCS assesses if Mindanao quake affected nearby volcanoes

Marje Pelayo   •   December 16, 2019   •   573

MANILA, Philippines – More than a hundred aftershocks were felt across Mindanao since a magnitude 6.9 earthquake hit Davao del Sur on Sunday (December 15).

According to Science and Technology Undersecretary and PHIVOLCS Officer in Charge Renato Solidum, their is a high possibility that the movement of Tangbulan Fault caused the earthquake.

Tangbulan Fault can generate up to magnitude 7.2 earthquake.

It measures to 69.2 kilometers and is located between Makilala-Malungon Fault and Digos Faults.

Solidum reminded of further aftershocks but the possibility of an even stronger tremor from both faults is minimal.

“Dahil ang lugar na iyan sa southern Mindanao ay matagal ng hindi nagkakaroon ng lindol na malalakas, (That area in Southern Mindanao has not experienced strong earthquakes for a long time),” Solidum said.

“Ngayon nagkataon na nagsimulang magsikilos ito (But now it is starting to move),” he noted.

The Philippine Institute of Volcanology and Seismology (PHIVOLCS) is now observing if the recent tremblor has impacted nearby volcanoes such as Mt. Apo and Mt. Matutum.

In 1991, Mt. Pinatubo in Zambales erupted a year after a strong earthquake occurred in 1990.

“Parang bote ng softdrinks. Kung may bote ka ng softdrinks [at] walang laman yung softdrinks, kahit anong alog mo walang lalabas siyempre. Pero kung may laman yung softdrinks at inalog mo pwedeng lumabas,” Solidum explained.

(Similar to a bottle of soda. If you have an empty bottle of soda, no matter how much you shake it, nothing will come out. But if it contains soda and you shake it, the liquid would spill.)

“So the condition is, the volcano will respond if there is magma ready to be erupted,” he added.

PHIVOLCS advised owners of structures to have their establishments check before occupancy.

It is also important to learn from past experiences to be ready for future earthquakes that may happen in different areas in the Philippines especially in Metro Manila.

“Nakita ninyo naman ang ilang mga video shared sa social media. Hindi ayos ang pagreresponde ng mga tao na nagsisitakbuhan (We saw from the videos shared on social media, the responses were chaotic. People were running confused),” Solidum noted.

“Kailangang maprotektahan ang ating sarili at baka magka-stampede pa kung lahat ay talagang tatakbo lang (We need to protect ourselves but stampede might happen if all of us would just run around),” he concluded. – MNP (with details from Rey Pelayo)

Mt. Kanlaon possible to generate a major eruption – PHIVOLCS

Marje Pelayo   •   June 24, 2020

MANILA, Philippines — Mount Kanlaon in Negros Island is one of the most active volcanoes in the country similar to Mt. Pinatubo in Zambales, Mt. Mayon in Albay, Mt. Bulusan in Sorsogon, and Mt. Hibok-Hibok in Camiguin Island. 

Based on the observation of the Philippine Institute of Volcanology and Seismology (PHIVOLCS), the volcano has recorded abnormal activities especially last Sunday (June 21) and Monday (June 22).

Earthquakes have been felt as the volcano spewed ashes.

Department of Science and Technology (DOST) Undersecretary and PHIVOLCS OIC Renato Solidum explained these activities may be attributed to an existing fault.

They are now observing if the tremors will move under the summit.

“Itong pagkilos ng fault ay posibleng sanhi dahil sa pag pressurize ng lugar sa Kanlaon volcano ng hydrothermal fluids o pagpapakulo ng tubig o di kaya ay mas malalim pang magmatic activity,” Solidum noted.

Most of the Kanlaon’s explosions were phreatic, the agency observed.

Based on studies of rock samples from the volcano, its last lava episode was in the early 1900’s.

In the 1996 eruption, three persons who went up the volcano died.

Usec. Solidum said Mt. Kanlaon is not comparable with the Taal Volcano when it comes to activities, though a major eruption is possible.

Alert Level 1 has been raised over Mt Kanlaon since March this year.

“Kung ang tanong mo ay mabilis yung escalation, wala tayong nakikitang ganung history sa Kanlaon based on record history (We didn’t have any record of rapid escalation based on Kanlaon’s record in history),” Solidum said. 

“Pero yung posibilidad ng magkaroon ng mas malakas na eruption ay nandoon katulad ng Mayon Volcano; not Taal Volcano, hindi naman sila pareho ng setting (But there is the possibility of a major eruption like with Mount Mayon, but unlike Taal Volcano. Their settings are different),” he added.

PHIVOLCS warned that entering the four-kilometer permanent danger zone is strictly prohibited. MNP (with reports from Rey Pelayo)

Mga residente sa La Carlota City sa Negros, pinaghahanda na sa gitna ng pag-aalboroto ng Mt. Kanlaon

Robie de Guzman   •   June 24, 2020

Inihahanda na ng pamahalaan ng La Carlota City sa Negros Occidental ang disaster management plan na ipatutupad sakaling lumala ang ipinakikitang abnormalidad ng Mount Kanlaon.

Ayon kay La Carlota City Mayor Rex Jalando-on, nakapaloob sa kanilang plano ang pagtukoy sa mga barangay na lubos na maapektuhan at kailangang ilikas sakaling sumabog ang bulkan o kaya ay mas tumindi pa ang nararanasang pagyanig sa paligid ng bulkan.

Nakapaloob rin sa disaster management plan ang gagamiting logistics, transportation at available resources, pati na ang positioning ng food packs at mga lugar na maaaring gamiting temporary shelter ng mga ililikas na residente.

Tiniyak rin ni Jalando-on na mayroong P10 milyong quick response fund na maaaring gamitin ang lokal na pamahalaan.

Nagsasagawa na rin sila ng kampanya upang paalalahanan ang mga residente na maghanda at maging alerto sa gitna ng nararanasang pagyanig sa kanilang lungsod.

May gagawin ring drill upang malaman ng mga residente ang mga dapat gawin kapag nakaranas ng malakas na lindol o kaya ay sumabog ang bulkan.

Sa ulat ng Philippine Institute of Volcanology and Seismology (PHIVOLCS) Martes ng umaga, nasa 104 volcanic-tectonic earthquakes ang naitala sa Mount Kanlaon.

Bahagya ring humina ang inilalabas na puting usok ng bulkan na umabot sa taas na 300 metro.

Iniulat rin ng PHIVOLCS ang patuloy na deflation sa ibabang bahagi ng bulkan at inflation o paglobo naman sa gitnang dalisdis na nangangahulugan umano ng hydrothermal o magmatic activity sa ilalim ng lupa.

Muli ring nagpa-alala ang ahensiya na nasa alert level 1 ang Mount Kanlaon na ang ibig sabihin ay nagpapakita ito ng abnormal na aktibidad at nasa “period of unrest.”

Naka-deklarang permanent danger zone ang four-kilometer radius ng bulkan at ipinagbabawal ang pagpasok rito ng mga tao.

Sakop naman ng eight-kilometer radius ng bulkan ang mga Barangay ng Ara-ala at Yubo kaya’t mahigpit itong binabantayan ng lokal na pamahalaan. – RRD (mula sa ulat ni Correspondent Lalaine Moreno)

Phivolcs lowers Taal Volcano alert to level 1

UNTV News   •   March 19, 2020

MANILA, Philippines – The Philippine Institute of Volcanology and Seismology (Phivolcs) on Thursday said it has downgraded the alert on Taal Volcano to level 1 following the decrease in volcanic quakes and surface activity at the main crater.

In its bulletin, Phivolcs said the Taal Volcano’s condition in the succeeding four weeks after its alert was lowered to level 2, has been characterized by low-level volcanic earthquake activity, stabilizing ground deformation of the Taal Caldera and the Taal Volcano Island edifices, and weak surface activity at the Main Crater and the Daang Kastila fissure.

“DOST-PHIVOLCS is lowering the alert status of Taal Volcano from Alert Level 2 to Alert Level 1 to reflect the overall decreasing trend in the level of monitoring parameters,” its bulletin reads.

State volcanologists said that alert level 1 means that the volcano is still in “abnormal condition,” and that this “should not be interpreted that unrest has ceased or that the threat of an eruption has disappeared.”

Under alert level 1, sudden steam-driven or phreatic explosions, volcanic earthquakes, minor ashfall and lethal accumulations or expulsions of volcanic gas can occur and threaten areas within the Taal Volcano Island.

The alert level may be raised back to alert level 2 “should pronounced change in monitored parameters forewarn of renewed unrest,” Phivolcs said.

The agency reminded residents that entry to Taal’s permanent danger zone, especially the vicinities of the Main Crater and the Daang Kastila fissure, remains strictly prohibited. 

The Taal Volcano was placed under alert level 4 when it spewed ash on January 12 which sent thousands of residents to temporary shelters and disrupted businesses in surrounding areas.

It was later lowered to alert level 2 several weeks later due to decreased unrest. — ROBIE DE GUZMAN

REACH US

The Philippine Broadcast Hub

UNTV, 915 Barangay Philam,

EDSA, Quezon City M.M. 1104

(+632) 8396-8688 (Tel)

info@untv-newsandrescue.com (General inquiries)

ABOUT UNTV

UNTV is a major TV broadcast network with 24-hour programming. An Ultra High Frequency station with strong brand content that appeal to everyone, UNTV is one of the most trusted and successful Philippine networks that guarantees wholesome and quality viewing experience.