3 hours ago
https://earthquake.usgs.gov/earthquakes/.../executive
I keep an eye on unusual seismic readings and this one caught my attention. From the perspective of two seismographs, I noticed that waves associated with this temblor were time-compressed into a sharp, punctuated burst of activity, but the same waves were spread out evenly as one might expect as measured from other stations. The two nearest stations, one in Nevada and one in Columbia, CA show this compression.
It's my hypothesis that fluids of tapered density can cause sound and heat to become compressed as they are conveyed over distance. Magma, for example, if under extreme pressure in one area might gradually release its pressure, resulting in a pressure gradient which causes seismic waves to travel at variable speeds through the liquid, causing seismic waves emitted at a latter point in time to be able to catch up with the initial waves, causing compression over time. If that's what's occurring here, it could indicate that a dormant volcano in the High Sierras and, more specifically, in the South Mono area is getting ready to go active. These are rarely active, but if they were to become active again, it could be a disaster for the people in the area.
The waves are being compressed as a result of density gradually decreasing over the distance from the epicenter of this foreshock toward the detector. Mono Lake, Lee Vining and Yosemite could become volcanically active based upon these readings, but the USGS quite frankly doesn't know what it's doing. It's something to watch.
I keep an eye on unusual seismic readings and this one caught my attention. From the perspective of two seismographs, I noticed that waves associated with this temblor were time-compressed into a sharp, punctuated burst of activity, but the same waves were spread out evenly as one might expect as measured from other stations. The two nearest stations, one in Nevada and one in Columbia, CA show this compression.
It's my hypothesis that fluids of tapered density can cause sound and heat to become compressed as they are conveyed over distance. Magma, for example, if under extreme pressure in one area might gradually release its pressure, resulting in a pressure gradient which causes seismic waves to travel at variable speeds through the liquid, causing seismic waves emitted at a latter point in time to be able to catch up with the initial waves, causing compression over time. If that's what's occurring here, it could indicate that a dormant volcano in the High Sierras and, more specifically, in the South Mono area is getting ready to go active. These are rarely active, but if they were to become active again, it could be a disaster for the people in the area.
The waves are being compressed as a result of density gradually decreasing over the distance from the epicenter of this foreshock toward the detector. Mono Lake, Lee Vining and Yosemite could become volcanically active based upon these readings, but the USGS quite frankly doesn't know what it's doing. It's something to watch.