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Benjamin McKeown

Earthquake Glossary - 0 views

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    "A landslide is a movement of surface material down a slope. "
Benjamin McKeown

Blaming natural disasters on climate change will backfire. - 0 views

  • Thus, the migration in response to the severe and prolonged drought exacerbated a number of the factors often cited as contributing to the unrest, which include unemployment, corruption, and rampant inequality. The conflict literature supports the idea that rapid demographic change encourages instability. Whether it was a primary or substantial factor is impossible to know, but drought can lead to devastating consequences when coupled with preexisting acute vulnerability, caused by poor policies and unsustainable land use practices in Syria’s case and perpetuated by the slow and ineffective response of the Assad regime [emphasis added].
  • suggests that an unprecedented drought accentuated frustration with the Assad regime and led to migration from rural to urban areas.
  • While climate change will probably increase the number and intensity of heavy showers, leading to more frequent landslides, intensive logging and government negligence in permitting new construction in these areas cause the real disasters.
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  • While global warming probably accentuated the torrential rains, it was actually policy failures that allowed heavy rains to cause the flood and human suffering: Over the past two decades, the city government has systematically disregarded basic principles of ecology and urban planning by building structures in flood plains and marshlands.
  • Climate change is often going to be the domino that falls. But that does not mean we can ignore the rest of the dominos in the row.
Benjamin McKeown

'Surprise' Palu tsunami clue found on seafloor - BBC News - 0 views

  • he quake occurred on what is called a strike-slip fault, where the ground on one side of a rupture moves horizontally past the ground on the other side. It is not a configuration normally associated with very large tsunamis.
  • When we overlap the bathymetric data from before and after, we can see that almost all of the area of the seafloor inside the bay subsides. And from this data, we can also observe [the movement] to the north. So, actually, we have a vertical and a horizontal displacement,
  • here is evidence of several underwater landslides in the data. These, too, could have been a factor
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  • nother possibility is an upwards thrust of the seabed in a zone some distance from Palu where the strike-slip fault splits into diverging tracks
  • Palu witnessed a lot of liquefaction, where the structure of soils in the city was seen to collapse, to become fluidised and flow even on very low gradients.
  • That basically leaves no time for warnings. That's very different from Japan (in 2011) where there was an eternity of time - more than 30 minutes everywhere until the first person was killed by the tsunami. That's the challenge for these local tsunamis: people have to self-evacuate."
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