Thursday, 29 June 2017 18:41

At the sound of the alarm, employees of the Department of Science and Technology - Philippine Institute of Volcanology and Seismology (DOST-PHIVOLCS) performed the Duck, Cover, and Hold technique and evacuated the building as they participate in the 2nd quarter Nationwide Simultaneous Earthquake Drill (NSED).

NSED is a quarterly activity organized by the Office of Civil Defense (OCD) that seeks to heighten public awareness and to educate the public on the importance of preparedness against earthquake hazards.

The 2nd quarter NSED ceremonial venue was held in Davao City at Bolton Street along University of Mindanao on June 29, 2017, Thursday at 2:00 PM. DOST Usec. Renato Solidum, Department of National Defense (DND) Usec. Ricardo Jalad, and Davao City Administrator Zulieka Lopez led the ceremonial pressing of the button to indicate the start of the earthquake drill. The drill in Davao City simulated a Magnitude 7.0 earthquake generated by the Central Davao Fault Zone (CDFZ) with the Intensity of PHIVOLCS Earthquake Intensity Scale (PEIS) VIII [Very Destructive]. Barangay residents, students, and owners of business establishments participated in the community-based drill. Different scenarios were performed to showcase response during a strong destructive earthquake.

As the agency mandated to monitor and study earthquakes, DOST-PHIVOLCS pushes for the continued promotion of earthquake awareness and preparedness since it introduced the conduct of earthquake drills in schools way back 2002.

Philippines is a seismically active country with approximately 90 destructive earthquakes and 40 tsunamis recorded in the past 400 years. Strong earthquakes may result to earthquake hazards such as ground shaking, ground rupture, liquefaction, tsunamis, and earthquake-induced landslide. Awareness and preparedness will increase our chances against natural hazards and disasters.

Tuesday, 30 May 2017 12:54

Mati City, Davao Oriental, Philippines, 30 May 2017

The Philippine Institute of Volcanology and Seismology – Department of Science and Technology (PHIVOLCS-DOST) is conducting a series of 1-day seminar-workshops on Earthquake Awareness and Preparedness for Local Government Units (LGUs) and Barangay Officials of Davao Oriental. The seminar-workshop will be held on May 30, 31, and June 1, 2017 at Honey’s Hotel and Restaurant, Mati City.

The province of Davao Oriental was identified as an earthquake and tsunami prone area. It is transected and bounded by active earthquake generators such as the Philippine Fault and the Philippine Trench. The tsunami threat posed to the eastern Philippine archipelago includes both local and distant tsunamis. Large-magnitude earthquakes that also generated a tsunami have occurred in the region.

The one-day seminar-workshop aims to strengthen the province’s awareness about earthquake and tsunami, as well as to help them prepare in case such natural hazards occur in the region. LGUs and Barangay Officials’ role in correct information dissemination will be discussed in the seminar-workshop.

PHIVOLCS, thru the Provincial Government of Davao Oriental, invited participants from the municipalities of Boston, Cateel, Baganga, and Caraga to attend on May 30. Officials from the municipalities of Manay, Tarragona, BanayBanay, and Lupon and municipalities of San Isidro, Governor Generoso, and Mati City are expected to attend the seminar on May 31 and June 1, 2017, respectively.

In addition, PHIVOLCS will conduct a press conference, PHIVOLCS Infosentro, to give update regarding the recent earthquakes at Honey’s Restaurant on May 31, 2017, and on June 1, Usec. Renato Solidum will be the guest speaker in “Kapihan sa Apo View” at Apo View Hotel, Davao City.

Last year, PHIVOLCS conducted a “Teachers’ Training on Communicating Earthquake and Tsunami Hazards” for elementary teachers from the Division of Mati and District of Manay, Division of Davao Oriental last October 12 and 13, 2016 at Honey’s Hotel and Restaurant, Mati City, Davao Oriental.


[Download Press Release Here]



For information about the event, please contact:

Dr. Renato U. Solidum, Jr.

Undersecretary for Disaster Risk Reduction and Climate Change, DOST

and Officer-in-Charge, PHIVOLCS

Wednesday, 12 April 2017 17:53

12 April 2017

What is happening in Lanao del Sur?

At 5:21 AM on 12 April 2017, Wednesday, a moderate earthquake of magnitude 6.0 shook the island of Mindanao. The epicenter is located 13 km northwest of Wao, Lanao del Sur at a depth of 1 km.  The earthquake was generated by the movement of a northwest trending active fault in the area. Small-magnitude earthquakes followed afterwards, and as of 3:00 PM of 12 April 2017, 73 aftershocks have been recorded by PHIVOLCS seismic monitoring network.

Based on preliminary intensity reports, the strongest ground shaking was felt at PHIVOLCS Earthquake Intensity Scale (PEIS) VII (Destructive) in Wao, Lanao del Sur and Kalilangan, Bukidnon. Furthermore, it was felt at PEIS VI (Very Strong) in Amai Manabilang, Lanao del Sur;  PEIS V (Strong) in Pangantukan, Bukidnon, and Banisilan, Cotabato.  It was also felt at PEIS IV in Cagayan de Oro City, Iligan City, Cotabato City, Gingoog City in Misamis Oriental, Matalam in North Cotabato, Valencia and Maramag in Bukidnon, and Davao City. This was felt at PEIS III to I in Kabacan and Arakan in North Cotabato, Quezon and Don Carlos in Bukidnon, Pikit in Cotabato, Lebak in Sultan Kudarat, Kidapawan City, Koronadal City, and Mambajao in Camiguin. Damages to some buildings and roads due to strong ground shaking were reported near the epicentral area. Landslides were also reported in Amai Manabilang (Bumbaran). At the time of writing, there are no reports of casualties.

Large magnitude earthquake has affected Lanao del Sur in the past!

On April 1, 1955, a magnitude 7.5 earthquake was experienced in Lanao area. This earthquake, which is considered to be one of the most damaging historical earthquakes in Lanao del Sur, resulted to about 400 deaths. Strong ground shaking was also felt during this event, resulting to significant damage to infrastructures including a mosque in Tugaya municipality near Lake Lanao. Several houses also collapsed and wharfs were damaged in Zamboanga City and Pagadian City. Liquefaction and landslides were also documented.

Aside from this, several small to moderate earthquakes have also been recorded within the province, with intensities ranging from PEIS IV to VII.

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Tuesday, 11 April 2017 14:14

11 April 2017

What is happening at Batangas Province?

A phenomenon called earthquake swarm is currently happening at Batangas.  An earthquake swarm is a burst of earthquake activity clustered in a specific area in a short period of time due to movement of a fault. The Batangas swarm started on 4 April at 8:58 PM, and is still ongoing to date.

Large-magnitude earthquakes have also affected Batangas in the past!

At least six large earthquakes had affected Batangas province – the Mindoro earthquakes of November 15, 1994, April 9, 1942, and May 26, 1889, and the earthquakes of April 26, 1972, October 1, 1869, and September 16, 1852 whose epicenters were located in West Philippine Sea. The 1994 Magnitude 7.1 Mindoro Earthquake was felt at intensity VII in the epicentral areas and may have shaken Batangas at intensities of V to VI or even VII while the 1889 Magnitude 6.4 Earthquake was felt at Intensity VI-VII in Mindoro and Batangas. The 1852 Magnitude 7.6 and 1869 Magnitude 6.6 offshore events were reportedly felt at Intensity VII in and around Batangas. Although there were no accounts of direct damage in Batangas due to the 1994, 1972, and 1942 events, the 1852, 1869 and 1889 events damaged several buildings and infrastructures in the area.

Why do earthquakes occur at Batangas?

Batangas is one of the seismically active areas in the Philippines.  Instrumental monitoring of earthquakes for the past century has detected many small to large-magnitude earthquakes near Batangas generated by the Manila Trench and Lubang Fault.  The Manila Trench is an earthquake generator located offshore west of Luzon Island, roughly parallel to the Philippine archipelago in the north but veers very close to land at the southern tip of Occidental Mindoro.  Another offshore earthquake generator is Lubang Fault, located between Mindoro Island and Batangas, which is also the locus of small to large-magnitude earthquakes.  Other active faults on land are present in Southern Luzon, such as the Valley Fault System and the Philippine Fault. The current series of earthquakes in Batangas can be attributed to the movement of an unnamed local fault in the vicinity of the Tingloy-Mabini area.

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list of barangay at risk