(it’s jam band friday – http://www.youtube.com/watch?v=20Feq_Nt3nM )
This maybe the longest list of Qualifiers I have ever published and I have to start by eating crow to boot. I made a missssstaaake yesterday. The piece that I was quoting yesterday was actually a piece on seismic activity, but I thought what it said was more applicable to Volcanic eruptions. I said that the Natib Caldera had erupted 3,000 years ago, but the actual article said that a major fault shift had occurred every 2,000 years. The last major fault shift was 3,000 years ago so a major Earth Quake was overdue. The caldera last blew 14 to 18,000 years ago and not enough is known about its activity to say what its periocity is. Whew, I feel so much better…A major earthquake in the area is overdue.
( I know that Shake Rattle and Roll isn’t really a jam song but what the heck it’s Friday)
As was noted in one of the comments in the seismic piece, the Philippines is not alone in either being on the Ring Of Fire nor is it the only Earth Quake prone zone in the world. Japan and America are both very sophisticated places technologically and also have extensive infrastructures to handle disasters in general. The Philippines is neither. Plus where are you going to evacuate too? It is an island. Not only that but the Japanese and the Americans have released a lot of radiation over the years. Look the big deal is Bataan is not fueled. Once it is fueld you might as well run it because everything is radioactive anyway. Drago in the US is just as much a threat. I bitched about it for years while it was being built and submitted written protest to the Nuclear Regulatory Agency in DC when it was Licensed.
So having said all that, the Philippines really shakes:
Everyday. Why because the Philippines sits on the edge of a Techtonic Plate. So really BIG things can happen:
( Elvis shake those hips http://www.youtube.com/watch?v=dCBT7PfAEgc&feature=related )
Earthquake Devastates Philippines
By Cathy Clark and Jim Taylor
On July 16, 1990 at 4:26 p.m. local time, a severe earthquake registering 7.7 on the Richter scale struck the northern Philippines. The earthquake caused damage over a region of about 7700 square miles, extending northwest from Manila through the densely populated Central Plains of Luzon and into the mountains of the Cordillera Central.
Over 5,000 people were reported dead or injured, and in excess of 2300 infrastructures were either destroyed or seriously damaged. While the quake was devastating, it was not an unusual occurrence in the Philippines; since 1950 alone there have been six major earthquakes at various locations in the archipelago, having magnitudes ranging from 7.3 to 8.3.
Buildings were decimated by ground shaking, soil failure and liquefication (causing them to settle into the ground), and landslides.
Nearly all multistory buildings in the Philippines are constructed of reinforced concrete frames, supporting slab floors. Short-column failure was evident in many buildings observed to have the classic diagonal cracking where the column was acting as a short shear wall and could not carry the loads. Many unreinforced masonry infilled walls separated from the concrete frames and collapsed.
In the heavily shaken regions, two general types of disastrous failure to multistory, larger reinforced concrete buildings were observed–failed first stories and total building collapse.
First-story (or Soft-story) Failures
The ground floor of a building is frequently the weakest part of the structure. It is seldom enclosed on all four sides by walls capable of resisting shear forces, and it is also generally taller than upper floors. Ground floor shops, stores, lobbies, or garages normally allot most of their front wall area to doors or plate glass, leaving one side of the building with no shear resistance. Bending and shear forces induced by strong ground shaking are therefore concentrated in the ground-floor columns. As a result, the building may fail by collapse of only its first story, with the stronger upper section of the building remaining intact.
Many multistory building failures or “pancake” collapses (typically with structures of six to ten stories) were observed in the city of Baguio. One such collapse included a nine-story hotel which killed over a dozen occupants on the ground floor. This type of damage has been observed repeatedly in numerous earthquakes throughout the world where design and construction deficiencies exist.
Not only that but it appears to happen about once every 20 years or so:
The 1968 Casiguran earthquake occurred on August 2, 1968 at a magnitude of 7.3 on the Richter scale. The earthquake’s epicenter was located in Casiguran
Casiguran is a 3rd class Philippine municipality in the northern part of the Philippine province of Aurora province, Philippines. It is located 121 km from Baler, Aurora, the provincial capital…. Quezon
Quezon is a Provinces of the Philippines of the Philippines located in the CALABARZON Regions of the Philippines in Luzon. The province was named after Manuel L….(now part of Aurora province).The city of Manila, or simply ‘Manila’, is the Capital of the Philippines and one of the 17 cities and municipalities that make up Metro Manila…. was the hardest hit with 268 people were killed and 261 more were injured. Many structures that suffered severe damage were built near the mouth of the Pasig River
The Pasig River is a river in the Philippines and connects Laguna de Bay into Manila Bay. It stretches for and divides Metro Manila into two….on huge alluvial deposits. A number of buildings were damaged beyond repair while others only suffered cosmetic damage. Two hundred and sixty people died during the collapse of the 6-story Ruby Tower, located in the district of Binondo. The entire building, save for a portion of the first and second floors at its northern end, was destroyed. Allegations of poor design and construction, as well as use of low-quality building materials, arose. In the District of Santa Ana is a district of the City of Manila in the Philippines, located at the southeast banks of the Pasig River, bounded on the northeast by Mandaluyong City, Makati City to the east, southwest is the Manila district of Paco, Manila, and to the west, Pandacan, Manila…. one person was injured by debris from a damaged apartment building.
Two more people from Aurora sub province and Pampanga is a Provinces of the Philippines of the Philippines located in the Central Luzon Regions of the Philippines. Its capital is the City of San Fernando, Pampanga….
died as a direct result of the quake. Around the town of Casiguran, there were several reports of landslides, the most destructive one at Casiguran Bay.
So let’s put our thinking caps on here. The Luzon Earth Quake happened in 1990 and Pinatubo happened in 1991. What if the Luzon earthquake had hit Manila like the Casiguran. I don’t think I would have wanted to have had to worry about a Nuclear Reactor popping off. Guess what it has been about 20 years…