https://padlet.com/analbertina123/64mlc5llvk9m as a result of movements within the earth's crust or volcanic action. en-us 2018-02-04 04:11:03 UTC 2023-04-11 13:37:04 UTC hello@padlet.com https://padlet-assets.s3.amazonaws.com/icons/Brightnessdown.png analbertina123 https://padlet.com/analbertina123/64mlc5llvk9m/wish/227809369 a sudden and violent shaking of the ground, sometimes causing great destruction, as a result of movements within the earth's crust or volcanic action.]]> 2018-02-04 04:13:54 UTC https://padlet.com/analbertina123/64mlc5llvk9m/wish/227809369 analbertina123 https://padlet.com/analbertina123/64mlc5llvk9m/wish/227809566 Earthquakes generate three types of seismic waves: P (primary) waves, S (secondary) waves and surface waves, which arrive at seismic recording stations one after another. Both P and S waves penetrate the interior of the Earth while surface waves do not. Due to this, P and S waves are known as "body waves". Surface waves arrive last and are the least interesting to seismic tomographers because they don't penetrate deep inside the Earth, therfore provide little information about inacessible terrain.]]> 2018-02-04 04:17:38 UTC https://padlet.com/analbertina123/64mlc5llvk9m/wish/227809566 analbertina123 https://padlet.com/analbertina123/64mlc5llvk9m/wish/227810112 An earthquake (also known as a quake, tremor or temblor) is the shaking of the surface of the Earth, resulting from the sudden release of energy in the Earth's lithosphere that creates seismic waves. Earthquakes can range in size from those that are so weak that they cannot be felt to those violent enough to toss people around and destroy whole cities. The seismicity or seismic activity of an area refers to the frequency, type and size of earthquakes experienced over a period of time.]]> 2018-02-04 04:27:11 UTC https://padlet.com/analbertina123/64mlc5llvk9m/wish/227810112 analbertina123 https://padlet.com/analbertina123/64mlc5llvk9m/wish/227810517 an instrument that measures and records details of earthquakes, such as force and duration.]]> 2018-02-04 04:37:14 UTC https://padlet.com/analbertina123/64mlc5llvk9m/wish/227810517 analbertina123 https://padlet.com/analbertina123/64mlc5llvk9m/wish/227810724 a numerical scale for expressing the magnitude of an earthquake on the basis of seismograph oscillations. The more destructive earthquakes typically have magnitudes between about 5.5 and 8.9; the scale is logarithmic and a difference of one represents an approximate thirtyfold difference in magnitude.]]> 2018-02-04 04:42:38 UTC https://padlet.com/analbertina123/64mlc5llvk9m/wish/227810724 analbertina123 https://padlet.com/analbertina123/64mlc5llvk9m/wish/227811461 2018-02-04 04:57:46 UTC https://padlet.com/analbertina123/64mlc5llvk9m/wish/227811461