Not exact matches
They found that seismic
waves could trigger an earthquake in the simulated fault only if they
came in a narrow range of
frequencies.
The ability to block electromagnetic (EM)
waves comes about when a material's magnetic field resonates at the same
frequency as the
wave.
The evidence
comes both from the time it takes seismic
waves to travel through the core and from studies of the Earth's natural vibration
frequencies.
The Nature Geoscience paper showed that the high -
frequency waves that the quake produced
came from the deeper edge of the rupture, on the northern end away from Kathmandu.
The researchers
came up with a simple ratio to predict a delta's shape, based on a river's sediment flux, or the flow rate of sediment through a river, and the strength of ocean
waves, determined by a
wave's height,
frequency, and angle of approach.
But LIGO did not register the gravitational
waves coming from them until 9:50:45 Coordinated Universal Time on 14 September, when the
wave's
frequency rose above some 30 cycles per second (hertz)-- corresponding to 15 full black - hole orbits per second — and was finally high enough for the detectors to distinguish it from background noise.
When it
comes to radio
waves from beyond Earth, scientists tune to
frequencies between 1 and 10 gigahertz.
Gravitational
waves come in a range of
frequencies, just like light (electromagnetic radiation).
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Now we can see where Headline C
came from: global warming made the expected
frequency 23 times larger (because 8,547 / 379 = 23) so we expect to see a heat
wave of this magnitude (or warmer) 23 times more often because of global warming.