There were no immediate reports of destruction or casualties, but witnesses said the quake was very strong and shook the ground and walls. The Pacific Tsunami Warning Center said there was a risk big waves could spread km miles away from the epicenter, reaching as far away as Indonesia. The Philippines Institute of Volcanology and Seismology Philvolcs said no tsunami warning was issued after a quake it had measured at 7. S Geological Survey downgraded its own assessment of the magnitude to 6.
Facebook Twitter Fresh from the onslaught of the flooding brought about by the heavy monsoon, the city of Mandaluyong on September 29 was hit by a 2.
Although the effects of the earthquake were mild, one could not help but think whether the tremor was a sign of something bigger.
To put into things into perspective, all of the affected cities are classified as densely-packed, highly urbanized cities based on Philippine Census data, with each city having a population of more thanShould Mandaluyong or any other area within the Marikina Valley Fault System experienced a more stronger earthquake that day, we are looking at a possible national disaster.
On the other hand, there is still a lot to be learned about earthquakes. We have gathered the top ten popular urban myths about earthquakes in Metro Manila and attempt to expose the truth behind them.
An earthquake can happen any time of the day, regardless of the weather.
The Luzon earthquake, which was one of the strongest in the country so far at a surface-wave magnitude of 7. Small earthquakes do not prevent a large earthquake from happening, nor reduce the impact of an incoming stronger tremor.
US Geological Survey seismologist and American Geophysical Union fellow Susan Hough said in her piece for the Washington Post this is because of the fact that a strong earthquake requires a significant amount of energy coming from the ground given off at that single moment.
As such, the energy given off by smaller earthquakes is from the ground given off at a separate instance and is not coming from a larger tremor. You would have to blame pop culture for this belief. Cusack and his group are shown later in the scene on a small airplane looking back at the remains of the city, which had parts swallowed up by faults.
USGS insisted that this notion is false for the simple reason that the ground usually moves across a fault. If a fault would open, it means that there is no longer an earthquake because there is no more ground friction. Friction is needed in order for an earthquake to occur.
USGS said shallow cracks could form during an earthquake that could induce ground failures like landslides. Your pet dog or cat can sense danger, but could be just as clueless as you about an incoming earthquake.
Freelance geologist David Bressan said in his blog post on the Scientific American that there is no doubt that animals react to any change in their environment. Although animals do not have a particular sense to detect natural calamities like an earthquake, Bressan believe that animals are more attuned to their environment, and their heightened senses that are initially designed to protect them from enemies may have also been used to warn them of imminent environmental threat.
However, USGS recommends not using your pet dog or cat as an early-warning device against earthquakes. Copp argued that much of the weight of the ceiling will be carried by the tall object and the ceiling will end up like a sloped roof over you.
It is unclear whether the federal investigation on Copp has been resolved. Meanwhile, Copp is still actively promoting his theory in the US, Peru and Taiwan, according to the updates on his website. Staying put and taking cover under a sturdy object is still the best way to minimize the impact of a collision due to an earthquake.
Lifehacker said that when caught indoors during an earthquakehiding under a sturdy desk and staying put is the best way to protect yourself.
If you are in bed, covering your head with pillows and holding on to the bedframe is suggested as well. However, there is no exact timeframe as to when an earthquake of this magnitude could happen.
Phivolcs director Renato Solidum recently announced that Metro Manila could get isolated if it gets hit with a 7. According to him, a movement in the West Valley Fault, could split Manila into four regions and cause heavy damage to overbuildings, especially those in Makati, Mandaluyong, and areas near the Pasig River.
Regional Coordinator for Disaster Reduction Jerry Velasquez of the United Nations Environment Programme clarified that the likelihood of a strong earthquake destroying Metro Manila could not be foreseen in a specific period of time.
This means that although a strong earthquake similar to the one in Japan is bound to happen, there is no way for anyone in the world to predict when an earthquake would occur. The urban and residential areas located near the fault have complied with government requirements to ensure their safety against stronger earthquakes.
Rosa in Laguna, where major business and residential development are located. Phivolcs deputy administrator Bartolome Bautista was quoted as saying that the fault line moves every to yearsand that another major movement is anticipated.
And just like any other urban community located near a fault line like New York Clarendon-Linden fault system, Ramapo FaultCalifornia San Andreas Fault and San Francisco Hayward Fault Zonefor example, building codes and disaster mitigation programs have been catered to address situations of a major earthquake.
Solidum said that the National Building Code of the Philippines has always provided property developers a guideline in building properties especially near the fault line. Moreover, he said that developers are now required to secure permission from their agency before the construction of their projects.
Also, developers are not allowed to build properties within the five-meter buffer zone on both sides of the fault line. You are more likely safe in a tall building when you remain in a spot and protect yourself from moving or falling objects or people rushing to leave the building.
Jack Pappin for UK-based project management and design firm ARUP said that tall buildings nowadays are built to be safe from smaller seismic shocks at least. This is because tall buildings take into account the lateral loads produced by the winds that are usually higher than the tremors from an earthquake.
These new structures are designed to withstand a seven magnitude quake. No one can be ready for an earthquake.List of earthquakes in the Philippines topic The Philippines lies along the Pacific Ring of Fire, which causes the country to have frequent seismic and volcanic activity.
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