People in town first felt the tremor, and one voice asked whether others had felt it too.
A scientist identified the activity as a swarm, meaning many small quakes clustered together, located about 2 km deep directly beneath the town.
The US Geological Survey raised Long Valley to warning status, the highest level of concern in this sequence.
Drivers were told not to go north of Bishop.
Answers come from the transcript, with the exact spot cited.
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