Earthquake Collection 2017. Immediately after the Surigao Sequence in February, now the earth trembles in Batangas.
Why just in time? Because December 2016 we have encountered exceptionally lousy data excellent from Phivolcs. The Phivolcs operators who vital in the most up-to-date earthquakes are extremely imaginative. About one particular fifth of all records is made up of structure faults. As an alternative of making a minor databases with plausibility and structure checks, they even now use a Microsoft Word document. This doc is then exported as a world wide web-site.
In March we have overhauled our details capture script. It can now immediately suitable about 99 % of the vital problems. We did not trouble about the errors in the descriptions. So a element of Phivolcs’ creative imagination is preserved.
With the reprogramming of the knowledge capture script, we also made our Earthquake page entirely responsive. You can now examine all internet pages of Silent Gardens on your pill or your smartphone.
The Surigao Earthquake Collection
From February 10 to 20 the underground trembled involving Surigao and Leyte. The sequence begun on February 10 at 10:03 p.m. with a magnitude 6.7 quake just 16 km north-west of Surigao Town. This shallow, only 10 km deep, earthquake designed large destruction in Surigao Metropolis. This original shock experienced been followed by in excess of 200 quakes in the vicinity. This earthquake collection ended by February 20. Right here is the map with all quakes:
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The Batangas Earthquake Collection
And now we depend already the fourth day of earthquakes in Batangas. There experienced been 3 strong original shocks in the vicinity of Tingloy all around 9 p.m. on April 4. Up to this morning, April 7 at 10 a.m., we counted 202 quakes in the area of the Balayan Bay. In the past 11 hrs we counted by now 5 new functions.
The magnitudes of all these quakes are in between 1.7 and 5.5. The depth may differ in between 1 and 107 kilometers. The regular depth is 22.3 km.
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Far more Earthquakes?
When evaluating the earthquake figures from 2011 to now, we were a little bit astonished by the range. The very last column is normalized to the initially quarter of just about every calendar year, 96 times accurately.
Two probable answers
Reply 1: Anything pushes and tears in the underground with bigger intensity! The Philippines are the assembly position of numerous tectonic plates. If only just one of them moves faster than the other, the fault strains get below elevated anxiety. We are waiting for extra date of the USGS.
Remedy 2: The sensors of PHIVOLCS became more sensitive! The alternatively secure numbers of powerful and medium earthquakes supports this concept. The large discrepancies are in the quantities of weak earthquakes. This amount experienced been pretty much steady from 2013 to to 2015. Then it all of a sudden doubled. We’ll question PHIVOLCS and hope to get an solution.