Sometimes you can hear things creaking and cracking days prior to an event...In real big ones cars bounce off their tires in parking lots...
Brick and mason are the first to crumble...Fortunately the wooden stucco structures in places like CA bend and give...but the real old fireplaces go....Had a friend once in the mountains see his stream start flowing from almost dry, just prior to one.
That’s a lot of quakes for a region not known for this kind of frequency.
Hope ya all can avoid any cataclysmic event!
I felt this one, when it happened! Everyone in the house wondered how long the shaking was going to go on as things were shaking and swaying in the house.
The 5.7 magnitude quake in Prague followed an injection of waste-water approximately 650 feet away from the Wilzetta fault zone, a complex fault system about 124 miles in length. All three earthquakes exhibited a slip-strike motion, and did so at three different locations, indicating that three separate areas of the fault zone were activated.
Researchers believe that the increased pressure required to inject the water into areas previously occupied by oil caused the fault to “jump.” Heather Savage, a geophysicist at Columbia University’s Lamont-Doherty Earth Observatory, said that “when you overpressure the fault, you reduce the stress that’s pinning the fault into place and that’s when earthquakes happen.”
Geoffrey Abers, also a seismologist at Lamont-Doherty, agreed, saying that “[t]here’s something important about getting unexpectedly large earthquakes out of small systems that we have discovered here. The risk of humans inducing large earthquakes from even small injection activities is probably higher.”
Despite this risk, authorities in Oklahoma continue to allow waste-water injection near the Wilzetta fault.