Aug 30, 2019 02:09 AM
(This post was last modified: Aug 30, 2019 02:21 AM by C C.)
Earthquake Rattles Oregon Coast: What You Need To Know
https://www.forbes.com/sites/ericmack/20...d-to-know/
INTRO: A magnitude 6.3 earthquake off the coast of southern Oregon was felt as far away as the Seattle area on Thursday. There have been no reports of significant damage or injury, and the tremors did not generate a tsunami warning, but the temblor is sure to have frayed a few nerves in a region where the threat of a catastrophic earthquake has made big headlines in recent years. So it's important to know that the offshore earthquake, which is the biggest felt in the lower 48 states since the Ridgecrest, California quakes in early July, has little to do with the Cascadia Subduction Zone (CSZ). That's the "megathrust" fault that so many in the Pacific Northwest are worried about. (MORE)
Hints of a volcanically active exo-moon
https://www.sciencedaily.com/releases/20...115425.htm
EXCERPT: Jupiter's moon Io is the most volcanically active body in our solar system. Today, there are indications that an active moon outside our solar system, an exo-Io, could be hidden at the exoplanet system WASP-49b. "It would be a dangerous volcanic world with a molten surface of lava, a lunar version of close-in Super Earths like 55 Cancri-e" says Apurva Oza, postdoctoral fellow at the Physics Insitute of the University of Bern [...] the possible exomoon would orbit a hot giant planet, which in turn would race once around its host star in less than three days -- a scenario 550 light years away in the inconspicuous constellation of Lepus, underneath the bright Orion constellation.
[...] "The enormous tidal forces in such a system are the key to everything," explains the astrophysicist. The energy released by the tides to the planet and its moon keeps the moon's orbit stable, simultaneously heating it up and making it volcanically active. In their work, the researchers were able to show that a small rocky moon can eject more sodium and potassium into space through this extreme volcanism than a large gas planet, especially at high altitudes. "Sodium and potassium lines are quantum treasures to us astronomers because they are extremely bright," says Oza, "the vintage street lamps that light up our streets with yellow haze, is akin to the gas we are now detecting in the spectra of a dozen exoplanets." (MORE - details)
https://www.forbes.com/sites/ericmack/20...d-to-know/
INTRO: A magnitude 6.3 earthquake off the coast of southern Oregon was felt as far away as the Seattle area on Thursday. There have been no reports of significant damage or injury, and the tremors did not generate a tsunami warning, but the temblor is sure to have frayed a few nerves in a region where the threat of a catastrophic earthquake has made big headlines in recent years. So it's important to know that the offshore earthquake, which is the biggest felt in the lower 48 states since the Ridgecrest, California quakes in early July, has little to do with the Cascadia Subduction Zone (CSZ). That's the "megathrust" fault that so many in the Pacific Northwest are worried about. (MORE)
Hints of a volcanically active exo-moon
https://www.sciencedaily.com/releases/20...115425.htm
EXCERPT: Jupiter's moon Io is the most volcanically active body in our solar system. Today, there are indications that an active moon outside our solar system, an exo-Io, could be hidden at the exoplanet system WASP-49b. "It would be a dangerous volcanic world with a molten surface of lava, a lunar version of close-in Super Earths like 55 Cancri-e" says Apurva Oza, postdoctoral fellow at the Physics Insitute of the University of Bern [...] the possible exomoon would orbit a hot giant planet, which in turn would race once around its host star in less than three days -- a scenario 550 light years away in the inconspicuous constellation of Lepus, underneath the bright Orion constellation.
[...] "The enormous tidal forces in such a system are the key to everything," explains the astrophysicist. The energy released by the tides to the planet and its moon keeps the moon's orbit stable, simultaneously heating it up and making it volcanically active. In their work, the researchers were able to show that a small rocky moon can eject more sodium and potassium into space through this extreme volcanism than a large gas planet, especially at high altitudes. "Sodium and potassium lines are quantum treasures to us astronomers because they are extremely bright," says Oza, "the vintage street lamps that light up our streets with yellow haze, is akin to the gas we are now detecting in the spectra of a dozen exoplanets." (MORE - details)
