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PRIMER ON THE APRIL 2017 SERIES OF EARTHQUAKES IN BATANGAS PROVINCE
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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PAALALA:
Saturday, 08 April 2017 10:00

Ang PHIVOLCS-DOST ay hindi nagbibigay ng prediksyon patungkol sa lindol.

Para sa karagdagang impormasyon, bisitahin ang OPISYAL NA PHIVOLCS-DOST WEBSITE:

(www.phivolcs.dost.gov.ph), Facebook (www.facebook.com/PHIVOLCS) at Twitter (@phivolcs_dost).

PAKIUSAP, HUWAG magpadala o mag-forward ng anumang impormasyon na maaaring lalong makadagdag sa pagkalito at pagkatakot ng mga makakabasa nito.

 
Earthquake Advisory
Saturday, 08 April 2017 09:20

Date Issued: 08 April 2017

Time: 8:30 PM

 

This is to inform the public that two moderately sized earthquakes with magnitudes 5.6 and 6.0 occurred in Mabini, Batangas on 08 April 2017 at 3:07 PM and 3:09 PM respectively. The said events were reportedly felt in Mabini, Batangas at PHIVOLCS Earthquake Intensity Scale (PEIS) VII (Destructive) and were felt as far as San Fernando, Pampanga in the north at PEIS II (Slightly Felt) and Daet, Camarines Norte in the south at PEIS III (Weak). Furthermore, no threat of destructive tsunami waves is expected because the magnitude range of these events is not enough.

People are advised to stay calm and be alert. In case of another felt earthquake, do the “duck/drop, cover and hold” and move to a safe area after the shaking.

For more information, you may visit our official PHIVOLCS-DOST website (www.phivolcs.dost.gov.ph), Facebook (https://www.facebook.com/PHIVOLCS/) and Twitter (@phivolcs_dost) accounts.

PHIVOLCS-DOST

 

[Download Earthquake Advisory Here]

 
POSTER AND VIDEO OF THE 10 FEBRUARY 2017 MAGNITUDE 6.7 EARTHQUAKE AT SURIGAO DEL NORTE
Friday, 24 February 2017 07:59
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Video of the Impacts of the 10 February 2017 M6.7 Surigao del Norte Earthquake

 
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