|26 Earthquakes in and around Marinduque from Feb. 19 - March 4, 2017|
The 2017 destructive Surigao earthquake last Feb.10 at 6.7 magnitude damaged 300 houses and collapsed seven bridges.
But the most devastating quake prior to that was the 7.2 magnitude 2013 Bohol earthquake, said to have released underground a tremendous amount of energy equivalent to more than 30 Hiroshima atomic bombs.
No doubt these events are a wake up call for all Filipinos in the Philippines to brace for possible earthquakes that may strike elsewhere in the country anytime.
|The Central Marinduque Fault|
On October 20, 2006, Phivolcs reported a 5.3 magnitude earthquake in Marinduque around 10:30 p.m. with tremors reaching as far as Tagaytay and Quezon City.
The next day with the epicenter located 35 kilometers south and 89 degrees west of Boac, Marinduque a second earthquake struck at 1:27 am.. The Lubang and Marinduque faults were identified as the sources of the earthquake.
The Marinduque quake’s epicenter according to Phivolcs was traced to the eastern segment of the Lubang Fault located offshore between Mindoro island and Marinduque. Five major aftershocks and more than 700 minor aftershocks were recorded.
The quake caused no damage to property but sent many residents in Marinduque to panic. Phivolcs' Renato Solidum said that despite the earthquake at the Lubang Fault, people should remain alert against "the big quake", but said there is no way to predict where or when the big quake will occur.
2013 Marinduque swarms and the Bohol earthquake
|2013 Bohol earthquake. Photo: Marianne Bermudez|
Intrigued by the possibility that the Marinduque earthquake swarms could have triggered the Bohol tremors, I threw the question to the dedicated administrator of Earthquake-Report, Armand Vervaeck (Belgium). He responded in part as follows:
"Nobody will be able to tell you as science isn't able to make prognoses in strength and time. Swarms are not unusual and 98/100 nothing important happens thereafter. In some cases (like in l'Aquila Italy) swarms are precursors of something bigger to come. So I don't think that something will happen BUT we are not really sure about this :))
"Taken into account the location of the Marinduque quakes, they could also have been the trigger to free the Bohol energy BUT nobody will be able to prove that."Then came a scientific report two years later, in 2015, about Italian scientists discovering that seismic pressure transfers up to 1,000 km causing other earthquakes elsewhere! Story below.
The distance between Marinduque and Bohol is only 458.85 km, which is only half of the stated distance.
|Distance between Marinduque and Bohol is only 468.85 km. This distance is equal to 291.33 miles and 252.99 nautical miles.|
How earthquakes can trigger copycat quakes 1000 kilometres away