|USGS says the risk of damaging quakes triggered |
by oil field wastewater disposal is lower
this year but still significant.
USGS's second annual hazard map forecasting the danger of damaging quakes caused by man-made activity was published this week in the journal Seismological Research Letters, Soraghan writes. "The forecast showed a slight decrease in Oklahoma, although some portions are still considered to have a 10 to 12 percent risk of a damaging quake. But the Dallas area was removed from the map. That meant the number of people considered to be at elevated risk from man-made quakes dropped from 7 million to about 3.5 million."
"The likelihood of damaging ground shaking in central Oklahoma remains similar to that of natural earthquakes in high-hazard areas of California, according to the USGS assessment," Soraghan writes. "And USGS officials noted the level of hazard remains higher than what current building codes take into account. The forecast maps released yesterday indicate that the Raton Basin area along the Colorado-New Mexico border also remains at elevated risk. An area in West Texas, where companies have increased production from the Permian Basin, was added as being at a slightly elevated risk of damage from quakes."