Tullioz

Earthquake M 6.5 Northern Mindanao

46 posts in this topic


Earthquake Situation Report No. 1

Report on Affected Population

  • Surigao City Airport closed due to runway damage
  • Anao-aon Bridge in San Francisco municipality, Surigao del Norte split into three sections, towns isolated
  • Bridges along national highway going to Lipata suffered serious cracks
  • Lipata Ferry Terminal is temporarily closed. All vehicles in and out of Lipata Ferry Terminal are diverted to Surigao City Port
  • The municipalities of Malimono, Sison, San Francisco, Mainit and Taganaan, all in the province of Surigao del Norte are now on blackout
  • BREAD Rapid Assessment Team reported:

– power-lines are down, water supply interrupted

– bridges and a hotel collapsed and some homes damaged in Surigao City

– a landslide in Barangay Trinidad, Surigao City

 

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I came across this headline when searching for more information on this earthquake:

Quote

Philippines struck by strongest quake in more than 100 years

A 6.7 earthquake has hit the Philippines island of Mindanao, killing at least six people and injuring over 100, 17 seriously.

The tremor’s epicentre, at a depth of 10 kilometres, was just to the east of the city of Surigao.

It is the Philippines’ strongest earthquake since 1879, although the archipelago’s location on the Pacific Ring of Fire means it has frequent tremors. Friday night’s quake has triggered dozens of aftershocks.

http://www.euronews.com/2017/02/11/philippines-struck-by-strongest-quake-in-more-than-100-years

Anyone who has lived here for any length of time knows that his recent earthquake was not even comparable to some in the past, so I am not really sure where the idea of this one being the strongest in 100 years even came from. 

Quote

A magnitude 8.3 Ms earthquake struck Panay Island on January 25, 1948 
A Magnitude 8.0 earthquake in Mindanao (August 17, 1976)
A magnitude 7.9 earthquake struck Mindanao on August 16, 1976. 
A magnitude 7.8 earthquake struck Luzon on July 16, 1990.
A Magnitude 7.8 earthquake in Northern and Central Luzon (July 16, 1990)
A magnitude 7.6 earthquake struck Casiguran, Aurora, on August 2, 1968
A magnitude 7.6 quake struck 106 km near Guiuan, Eastern Samar on August 31, 2012
A magnitude 7.5 quake struck Northeastern Mindanao on July 11, 1912
A magnitude 7.5 quake struck Mindanao on January 1, 2001
A magnitude 7.5 quake struck Central and Southern Mindanao on March 5, 2002
A magnitude 7.0 quake struck Ragay Gulf on March 17, 1973.
A magnitude 7.2 earthquake struck Bohol on October 15, 2013
A magnitude 7.1 earthquake struck Panay Island on June 14, 1990
A magnitude 7.1 earthquake struck Mindoro on November 15, 1994
A magnitude 6.9 quake struck Negros, the rest of Central Visayas, and some parts of Mindanao on February 6, 2012
A magnitude 6.8 earthquake struck Bohol on February 8, 1990.

https://en.wikipedia.org/wiki/List_of_earthquakes_in_the_Philippines

Below is an explanation of how earthquakes are measured. 

Quote

 

The magnitude scale is logarithmic. That just means that if you add 1 to an earthquake's magnitude, you multiply the shaking by 10. An earthquake of magnitude 5 shakes 10 times as violently as an earthquake of magnitude 4; a magnitude-6 quake shakes 10 times as hard as a magnitude-5 quake; and so on.

To compare two earthquakes in terms of shaking, you subtract one magnitude from the other and raise 10 to that power: 10^(M1-M2).

For example, if the magnitude of one quake is 6 and another is 4, than the difference in magnitudes is 2, so the stronger earthquake shakes 10^2 or 100 times as hard as the milder one.

Fractional differences work the same way. Increase the magnitude by 0.1, and you multiply the shaking by 10^(0.1), or about 1.259—an increase of 26%. Increase the magnitude by 0.3, and the shaking almost exactly doubles. That's a handy rule of thumb to keep in mind.

http://www.sciencemag.org/news/2011/03/comparing-earthquakes-explained

 

 

Edited by Tullioz
chaminade1964 and samatm like this

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23 minutes ago, Tullioz said:

I came across this headline when searching for more information on this earthquake:

Anyone who has lived here for any length of time knows that his recent earthquake was not even comparable to some in the past, so I am not really sure where the idea of this one being the strongest in 100 years even came from. 

Below is an explanation of how earthquakes are measured. 

 

I read somewhere...strongest in Surigao in 100 years

Many mistakes in news...

also its in only one place written 15 dead...other news says "at least 126 people were injured, 15 of them in a serious condition."


 
Tullioz likes this

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19 minutes ago, Raven said:

I read somewhere...strongest in Surigao in 100 years

Many mistakes in news...

also its in only one place written 15 dead...other news says "at least 126 people were injured, 15 of them in a serious condition."

The strongest in Surigao is probably true. Too bad whoever wrote that story didn't catch the mistake. Unfortunately in the age of the internet, once a story is released it gets legs of its own and takes off from there. 

quake9.jpg.3d01ce7d8bbee0ee24a408fe3a17c0f6.jpg

 

Edited by Tullioz

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Sad... really sad... I was in the North Ridge shaker in So Cal. That really messes with your nerves too even if you came away unscathed. The after shocks are just mental mind fuks. 

HeyMike likes this

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Anyone ever get in touch with James? 
Any other members in the affected areas? 
Where is StateTrooper located? Anyone know?

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