The earthquake that occurred thousands of times in 2009.Hit Harrat Lunayyir, northwest region of Saudi Arabia, the quake mencenggangkan experts. For isolated areas, there was no volcano. So hard to find the reason why earthquakes happen all that often.
More than a year doing research, experts had found the reason why the earth is often rocked. Below ground in earthquake locations, there is lava (magma fluid incandescent) with a tremendous amount. Giant lava that is thought to ignite a series of earthquakes.
As reported by msnbc edition 27 September 2010, the scientists said stretch of lava in that area is very broad. Because of the extent of lava hamparat it causes the area referred to as “Lava Province.” Harrat in Arabic means the stretch of lava.
Expanse of lava fields in the soil that reaches approximately 180,000 square kilometers. Lava field that formed since 30 million years ago, or since the Saudis broke away from Africa, thought to be one of the triggers the formation of the Red Sea.
At first nearly all geologists suspect that the northwestern part of Saudi Arabia that includes a quiet area. However, some earthquakes and volcanic eruptions that occurred recently changed everything. The area is now suspected as the location of active volcanism.
In April and June 2009 more than 30,000 earthquake struck the ancient lava field. A total of 19 earthquakes recorded at 4 on the Richter scale.
The peak on May 19, 2009, 5.4-scale earthquake on the Richter scale that caused the walls of houses in the city of Al Mandy were damaged. Seismic sensors are not even mentioned the possibility of volcanic eruptions will occur. At that time, the Saudi Arabian government to evacuate about 40,000 residents from the site.
John Pallister, vulkanologis and Chief U.S. Geological Survey (USGS) for the volcano disaster assistance program, said the process of forming the Red Sea were related to the chain of volcanoes and lava bed in the basement.