Activity for the period August 15-21, 2005:

Updated at 9:20 AM (PDT) on Monday, August 15, 2005:

The realtime computer system detected and located seven small earthquakes in the Long Valley caldera region since the last update at 9:50 AM on the 14th. All had magnitudes M<2.0, and all were located in the Sierra Nevada south of the caldera. The low-level activity beneath the west flank of Mammoth Mountain continues with occasional M<1 earthquakes recorded on too few stations for computer-generated locations.

Updated at 9:10 AM (PDT) on Tuesday, August 16, 2005:

The realtime computer system detected and located four small earthquakes in the Long Valley caldera region since the last update at 9:20 AM on the 15th. All had magnitudes M<2.0, and all were located in the Sierra Nevada south of the caldera. The low-level activity beneath the west flank of Mammoth Mountain continues with occasional M<1 earthquakes recorded on too few stations for computer-generated locations.

Updated at 9:10 AM (PDT) on Wednesday, August 17, 2005:

The realtime computer system detected and located five small earthquakes in the Long Valley caldera region since the last update at 9:10 AM on the 16th. All had magnitudes M<2.0, and all were located in the Sierra Nevada south of the caldera. The low-level activity beneath the west flank of Mammoth Mountain with occasional M<1 earthquakes appears to be declining.

Updated at 9:10 AM (PDT) on Thursday, August 18, 2005:

The realtime computer system detected no earthquakes in the Long Valley caldera region large enough to be located since the last update at 9:10 AM on the 17th. The low level activity of M<1 earthquakes beneath Mammoth Mountain appears to have abated.

Updated at 9:20 AM (PDT) on Friday, August 19, 2005:

The realtime computer system detected and located four small earthquakes in the Long Valley caldera region since the last update at 9:10 AM on the 18th. All were located in the Sierra Nevada south of the caldera, and all had magnitudes M<2.0.

Updated at 9:10 AM (PDT) on Saturday, August 20, 2005:

The realtime computer system detected and located seven small earthquakes in the Long Valley caldera region since the last update at 9:20 AM on the 19th. All were located in the Sierra Nevada south of the caldera. The largest was a M=2.1 earthquake at 2:51 AM on the 20th located 0.5 mile north of Mt Hopkins beneath the west margin of Pioneer Basin.

Updated at 9:50 AM (PDT) on Sunday, August 21, 2005:

The realtime computer system detected and located five small earthquakes in the Long Valley caldera region since the last update at 9:10 AM on the 20th. All were located in the Sierra Nevada south of the caldera, and all had magnitudes M<2.0.