1112+julius+jenni+quake+report

Here is Julius and Jennis earthquake report.


 * __Why Wasn't There a Tsunami?__ **

Wednesday's Indonesia earthquake was similar in to the devastating 2004 quake, but this time there was no tsunami. What is the difference? Probably the location and the different kind of land moving. Geologists reported quickly on Wednesday that the quake was "predominantly strike-slip", what means that the movement of rock at the site of fracture was horizontal in nature.

"Tsunami can be caused in a number of ways, but typically it is where the seafloor can be moved vertically, and that displaces a large amount of water that travels outward from that source toward land," observed Bruce Pressgrave, from the US Geological Survey (USGS).

“This is not one of those; it was the seafloor moving horizontally - one part moving relative to the other," explained Dr Richard Luckett, a seismologist with the British Geological Survey. "And so this kind of earthquake, although very big and widely felt, is much less likely to cause a serious tsunami," he told the BBC.

It can be possible that the strike-slip earthquake can cause a tsunami, too but it’s a different way how it forms.

"One of the ways that strike-slip earthquakes can cause tsunami is if the shaking itself causes some kind of underwater landslide that then produces the movement in the water column," he told BBC News.