6.7 earthquake strikes: current seismicity in the Philippines as tectonic plate agitation increases

February 5, 2012PHILIPPINESThe Philippines, like Japan, sits in one of the most volatile tectonic areas on Earth but unlike Japan, the Philippines is under geological assault from plate movements on all sides. The Philippine plate is squeezed in between the Eurasian plate and the Pacific Plate, but the situation is more complex than that. The Philippine Islands are surrounded by complex plate boundaries, and the Philippines Plate rather consists of several micro-plates – squeezed in between two convergent plate margins. The lines with black triangles are active subduction zones with teeth on the over-riding plate. Lines with white triangles are passive subduction zones with teeth on the over-riding plate. The major Philippine fault zone is shown as a black line with arrows showing the movement direction. The volcanoes Pinatubo and Mayon are shown as red dots. The volcanoes of the Philippines are probably the most deadly in world. Both Pinatubo and Mayon are both capable of producing VEI6 type eruptions. Because the moon’s tidal influence is so great in the Pacific, volcanologists warned in 2006 that Mount Mayon could explode at any time and that the gravitational pull of a full moon could provide the final push. A full moon coincided with at least three of Mayon’s nearly 50 explosions over the last four centuries, including the two most recent in 2000 and 2001. The volcanoes  are concentrated in a northern volcanic arc above and east of the north-western subduction zone (Manila Trench) and in a southern volcanic arc above and west of the south-eastern subduction zone (Philippine trench). The Sulu trench also produce a (discontinuous) line of active volcanoes. The Mayon volcano may be associated with the transform fault that connects the eastern and the western subduction zones. This transform fault is offset by the younger north-south directed Philippine Fault. The Eurasian Plate is being subducted along the western side of Luzon and Mindoro at a rate of 3cm/year. The Philippine Fault Zone decouples the northwestward motion of the Pacific with the southwestward motion of the Eurasian Plate. Movements along other active faults are responsible for the present-day high seismicity of the Philippine Archipelago. –The Extinction Protocol
A 6.8 (6.7 downgraded by USGS) magnitude earthquake, at a depth at 29 miles, struck off the Philippines on Monday, northeast of Dumaguete, Negros island, at 0349 GMT, the U.S. Geological Survey reported. There were no immediate reports of casualties or damage, and the U.S. National Oceanic and Atmospheric Administration said that based on all available data a Pacific-wide tsunami is not expected.
This entry was posted in Earth Changes, Earth Watch, Earthquake Omens?, High-risk potential hazard zone, Lithosphere collapse & fisssure, Potential Earthchange hotspot, Seismic tremors, Signs of Magnetic Field weakening, Volcano Watch. Bookmark the permalink.

19 Responses to 6.7 earthquake strikes: current seismicity in the Philippines as tectonic plate agitation increases

  1. Yamkin says:

    Earthquake swarms near Katla and Henggil volcano on Iceland

    Small seismic swarms have occurred near Katla volcano (S Iceland), Henggil volcano (SW Iceland) and a weaker swarm near Askja (N-Central Iceland) during the past 48 hours. The cause of the swarms is unclear and their intensity is not alarming. They are not necessarily volcanic, but could related to tectonic stress release around the main Icelandic rift zones.



  2. KofUSA says:

    My question is, since the earthquakes in the Philippines are caused by subduction, could this trigger large earthquakes near Taiwan and that nuclear facility in Taiwan? I really don’t know how these things work, but couldn’t help but notice all the “connecting lines” on the map.


    There were two 4.5M earthquakes in Taiwan shown on rsoe alert map, one was 39.26 km from a submarine volcano and 40.48 km from a nuclear facility. If you zoom out, you can see that the Philippines lies to the south of Taiwan. There is a blue line (subduction zone) that runs from the Philippines north toward Taiwan and branching off of this blue line is a white line (continental convergent boundary) that runs through Taiwan which appears to run thru an offshore oil terminal, not to mention that it looks fairly close to the nuclear facility.


  3. luisport says:

    New hot springs in Greenland after an earthquake (swarm?)
    Posted on February 5, 2012 by Jón Frímann
    While hot springs are in few areas of Greenland. They are not common and not as hot as those in Iceland. I do not know a lot about the details of geology of Greenland. So I am unsure on the details why there are hot springs in Greenland to start with. But this news is even more interesting for that exact reason.

    According to the Greeland Radio new hot springs opened up in the village of Kangersuatsiaq of the west coast of Greenland. After an what appears to be swarm of earthquakes, with the largest one somewhere around ML2.9 to ML3.? (enough to sake people pictures on the wall). A new hot springs did open up following this earthquakes. The water seems to be around 20C to up 36C. It might be warmer, as details on this are few and little.

    Best to my knowledge there is no known volcanoes in this area and have not been in the past ~65 million years or longer.



  4. Dennis E. says:

    We live in a world of constant changes.
    Some changes are for good, some for the worst.
    The geological history of the planet shows that no land mass is safe from any type upheaval wheather it be an earthquake, tidal wave or volcanic action.
    Unfortunately, some of these earth change events occur where humans live.
    So far, everyday in 2012 has been an eventful day it seems. Truely this will be an interesting
    year in earth change events.


  5. Irene C says:

    Wow, thank you Alvin. Very well explained.



  6. Fillade says:

    This appears very serious, for the philippino people, the mass of population is upon the micro plates, which is being squeezed by massive regional plates. The inhabitants have noware to go, the islands they live on could slip into the sea and or be over run with tsumani waves. The clock is ticking for these islands, very sad.



  7. Irene C says:



  8. Korinna says:

    There was a 6.8 just about 15 minutes ago.


  9. Jessy says:

    now here at mandaue cebu some of people got panic because of the sea water was enter some of the low places in the cities…..


  10. Garth Colin Whelan says:

    The news locally here was upgraded to 7.0. I was in Robinsons Mall in Dumaguete when the earthquake struck. There were cracks in the plastering of the building, and bits of plastering fell. I just stayed sat down while watching people’s response. Everyone panicked running for the doors. A tsunami level 4 warning was given, which then caused people to run to the mountains. I don’t know yet of any casualties, although a text message went around that a small boy was killed, but if there were many casualties, it would be because of panic related recklessness.

    BTW, a man from the Philippines, is a Filipino, not philippino; and a woman is Filipina…


  11. jadetvm says:

    Fillade, that was a very disturbing outlook for the Philippines. So now, I’m depending on prayer, and God’s mercy and protection for my country and people.


  12. Famar Santos says:

    It is really 2012 already!


  13. luisport says:

    Monday February 6 2012, 11:40:19 UTC 23 minutes ago Negros – Cebu region, Philippines 5.2 36.5 USGS Feed

    Monday February 6 2012, 11:33:37 UTC 30 minutes ago Negros – Cebu region, Philippines 6.015.1 USGS Feed


  14. luisport says:

    Update: 40 killed and many missing with 100 injured due to earthquake induced landslides. The death toll is expected to continue to rise.

    Update: 13 have been killed and many are missing following this earthquake. Landslides and aftershocks including a m6.2 in the last hour are making conditions difficult for rescuers.

    5 have been killed and at least 29 missing. more news to follow.

    Update 07:23 UTC : The NDRRMC said both damage to property and aftershocks are expected from the quake, whose epicenter was traced to 5 km northwest of Tayasan, Negros Oriental.

    Update 06:23 UTC : Not much more news than the 1 child killed has come from the authorities. Local tsunami alerts have been put out in the Visayas region – Alert Level 2 – stay away from the coast due to unusual waves.

    Meanwhile, National Disaster Risk Reduction and Management Council (NDRRMC) head Benito “Ramos said a child was crushed when a wall fell after the earthquake in Negros Oriental”.
    In Negros Occidental, Ramos said the quake damaged the glass windows of a mall. In Iloilo, cracks were also noted at a mall.
    The Cebu Department of Foreign Affairs building also had cracks.

    In Cebu, the provincial capitol suspended work in the afternoon.

    The tsunami alert is for the Cebu and Negros coastlines.


  15. luisport says:

    czaritoxCésar Quezada
    the wave has reached half of the people, not people reported injured or dead, authorities are evacuating the people into the hills.

    27 Feb 10
    czaritoxCésar Quezada
    Officials say there has been a tsunami on the island of Juan Fernandez (tinyurl.com/ybeec8h).-

    27 Feb 10 https://twitter.com/


  16. Based on a 5-year japan-funded study; the countries in the Pacific “ring of fire” will experience strong earthquakes. Some already happened: Haiti, Japan, New Z., etc. Japan’s Sendai is not yet the big one?. For the Philippnes is yet to come. It was said the Phil. gov’t authorities have been given a copy of the study but were busy campaigning in the last Presidential election. Election is over, what preparedness efforts are we doing???? Per climate change danger zone map; at full sea level rise due to melting ice caps, >90% of Metro Manila will be under water???….according to climate change Filipino expert…CDO, Bukidnon, Iligan, Albay included in danger zone areas!


  17. David W. Eby says:

    My third time here in the Philippines. After experiencing the recent quake and reading all this … snow doesn’t seem that bad after all.


  18. It’s very sad. Lord hears for our prayer for these people who are victims, died and survives of this tragedy.


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