Experts knew that Nepal’s devastating earthquake was coming – over one week ago.
50 earthquake scientists gathered last week in order to establish a solution to minimise the damage the quake was due to cause.
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“It was sort of a nightmare waiting to happen,” said seismologist James Jackson, head of the earth sciences department at the University of Cambridge in England. “Physically and geologically what happened is exactly what we thought would happen.”
But he didn’t expect the massive quake that struck Saturday to happen so soon. The magnitude 7.8 earthquake killed at least 1,180 people and caused widespread destruction.
“I was walking through that very area where that earthquake was and I thought at the very time that the area was heading for trouble,” said Jackson, lead scientist for Earthquakes Without Frontiers, a group that tries to make Asia more able to bounce back from these disasters and was having the meeting.
A Kathmandu earthquake has long been feared, not just because of the natural seismic fault, but because of the local, more human conditions that make it worse.
The same size shaking can have bigger effects on different parts of the globe because of building construction and population and that’s something the U.S. Geological Survey calculates ahead of time. So the same level of severe shaking would cause 10 to 30 people to die per million residents in California, but 1,000 maybe more in Nepal, and up to 10,000 in parts of Pakistan, India, Iran and China, said USGS seismologist David Wald.
While the trigger of the disaster is natural — an earthquake — “the consequences are very much man-made,” Jackson said. Except for landslides, which in this case are a serious problem, “it’s buildings that kill people not earthquakes,” Jackson said. If you lived in a flat desert with no water, an earthquake wouldn’t harm you, but then few people want to live there.
“The real problem in Asia is how people have concentrated in dangerous places,” Jackson said.
Kathmandu was warned, first by the Earth itself: this is the fifth significant quake there in the last 205 years, including the massive 1934 one.
“They knew they had a problem but it was so large they didn’t where to start, how to start,” said Hari Ghi, southeast Asia regional coordinator for Geohazards International, a group that works on worldwide quake risks. Ghi, Jackson and Wald said Nepal was making progress on reducing its vulnerability to earthquakes, but not quickly or big enough.
Ghi’s group on April 12 updated a late 1990s report summarizing the Kathmandu Valley risks.
“With an annual population growth rate of 6.5 percent and one of the highest urban densities in the world, the 1.5 million people living in the Kathmandu Valley were clearly facing a serious and growing earthquake risk,” the report said, laying out “the problem” the valley faces. “It was also clear that the next large earthquake to strike near the Valley would cause significantly greater loss of life, structural damage, and economic hardship than past earthquakes had inflicted.”
And for years there were no building codes and rampant development so homes and other structures could be built without any regards to earthquakes, the report said. There are now building codes, but that doesn’t help the older structures, and the codes aren’t overly strong, Ghi said.
It’s actually even made worse because of local inheritance laws that require property be split equally among all sons, Jackson said. So that means buildings are split vertically among brothers making very thin rickety homes that need more space so people add insecure living space on additional floors, he said.
“The construction is appalling in Kathmandu,” Jackson said.
Poverty and pollution make the problem worse, Jackson said. That’s because people don’t spend time worrying about some future earthquake because they have more pressing problems.
“If you live in the Kathmandu Valley you have other priorities, daily threats and daily nasty things happen to you in terms of air quality, water quality, pollution, traffic and just poverty,” Jackson said. “But it doesn’t mean that the earthquakes go away.”
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