WebShock waves are generated by meteoroids when they enter the Earth’s atmosphere. The Tunguska event and the 2013 Russian meteor event are the best documented evidence of … WebEarthquakes are the result of sudden movement along faults within the Earth. The movement releases stored-up ‘elastic strain’ energy in the form of seismic waves, which …

What causes earthquakes? - British Geological Survey

WebFigure 1. Main-shock location and aftershock distribution of the 1995 January 16 Hyogo-ken Nanbu (Kobe) earthquake. A map of the active faults in the area (Huzita & Kazama 1983) is shown in the ®gure. The star indicates the epicentre determined by JMA (1996) and the fault plane solution is the Harvard CMT mechanism. Aftershocks shown on the map (Hirata et … Web7 Sep 2024 · (b) Earthquakes are usually caused when rock underground suddenly breaks along a fault. This sudden release of energy causes the seismic waves that make the … dan the chase

What causes an Earthquake? - Geography Site

Web15 Jan 2007 · Earthquakes produce several types of shock waves. The most well-known are the P-waves (P for primary or pressure) and S-waves (S for secondary or shear). In the earth's crust, the P-waves travel around 6.5 km/s while the S-waves move at about 3.5 km/s. The actual speeds vary depending on the type of material they are going through. WebFocal depths have been known to be as large as 720 km (450 miles). Shallow earthquakes are more destructive than others because the mass of the rock above deeper earthquakes attenuates their shock waves. Shallow earthquakes generally occur near ocean trenches, like coastal California earthquakes, which have focal depths of less than WebOther answers have addressed part of it: seismic waves travel at different speeds depending on material properties, and S-waves cannot travel through liquid. As a result, the waves get variously reflected, and refracted, and blocked as the travel through Earth. This field of study is called seismic tomography. Volcanoes have also given us clues ... dan the caveman films