Since June 4 there have been over 100 earthquakes near Lakeview, Oregon. Lakeview is located about 100 east of Klamath Falls on the California border. The swarm of earthquakes have produced three quakes above 4.0, according to the USGS website. The largest was 4.4 on June 30.
Although it is difficult to pinpoint the exact location, Sherrod said, it appears the quakes are on a north/south alignment and appear to be about three miles deep on the Goose Lake Fault Line. Two groups are monitoring the data, the Pacific Northwest Seismology Network and he California Integrated Seismology Network.
The current series of earthquakes unsettling Lakeview is expected to continue, but it is not known for how long.
"It's a geologic phenomenon that we can't predict or forecast," said David Sherrod, of the US Geological Survey office in Vancouver, Wash., Friday, July 23. "It's a long-term earth process that has been going on for four million years."
Sherrod said there are three scenarios that could fit the current series or swarm that has been occurring since June 4.
1. The settling of the plates could be finished and completely die away for the time being.
2. They could continue for two to three months at the same intensity, similar to the swarm in 1968 in Adel and then die away.
3.They could be building toward a really large quake.
The most likely scenario, Sherrod said, is number two. Similar to the series in 1968, the most recent series has seen magnitudes in the 1.0 and 2.0 range, with an occasional 3.0. Most recently there has been a 3.1 on July 13 and 22 and also on July 22 a 4.3.
During the Adel sequence in 1968, there were 20 quakes 4.0 and above and two that were above 5.0.