I think you right. There’s a very recent basalt flow 3 mi SSW of the quake swarm, and the Aurora Crater cinder cone is 8 mi. to the SW. Keep your eyes peeled for fire fountains!
Nevada Earthquake Swarm has Experts Concerned
Above ancient Long Valley Supervolcano
http://www.iceagenow.com/Nevada_Earthquake_Swarm_has_Experts_Concerned.htm
Crap! Just what we need. Another dormant supervolcano similar to Yellowstone getting active again.
Two more quakes for Hawthorne, NV
Magnitude 4.1 and 4.6
http://www.iceagenow.com/Two_more_quakes_for_Hawthorne_NV.htm
Long Valley Supervolcano
(more info about it)
http://www.iceagenow.com/Long_Valley_Supervolcano.htm