earthquakes are caused mostly by rupture(破裂, 裂开) of geological faults(断层), but also by volcanic activity, landslides, mine blasts, and nuclear experiments. an earthquake's point of initial rupture is called its focus or hypocenter. the term epicenter means the point at ground level ...
Loss of life can be avoided through emergency planning, education, and the construction of buildings that sway rather than break under the stress of an earthquake. 想要减少地震伤亡,一方面可以通过实施紧急预案和地震知识普及教育,另一方面,提高房屋的抗震系数也显得...
Thousands of temblors occur every day. Here’s what you need to know about where they usually take place and how they're measured.
alongfaults associatedwithplateboundariesthatmostearthquakes occur. Furthermore, earthquakes are repetitive: As soon as one is over, the continuousmotion of the plates adds strain to the rocks untiltheyfailagain. 35 ❹ The actualmechanism of earthquakegenerationeluded geologists untilH.F. Reidcond...
Earthquakes happen at places calledfaults(orfault lines) where the jagged edges of tectonic plates grind against one another. Most earthquake activity happens in the middles of the oceans where tectonic plates are pushing apart on the floor of the sea. Some of the most violent earthquakes happen...
Ground rupture is another impact of the earthquake on the natural environment. It refers to the cracks that occur on the surface after the displacement of the faults, which is known as an earthquake. These ground ruptures can extend up to hundreds of kilometers.San Andreas Faultis one of th...
As it shrinks, it produces faults. These faults can be several meters long and dozens of meters tall. They are similar to the wrinkles in raisins (葡萄干). But unlike the soft skin of the raisin, the moon's crust (外壳) is hard and stiff, and therefore causes moonquakes when it ...
C You probably know what an earthquake is. But what about a moonguake? A recent study by NAS A shows that the moon is producing moonquakes because it is shrinking(缩小).Don't panic. As planetary scientist Thomas Watters comforts us, “This isn't anything to worry about. The moon may ...
Faults are cracks in the crustFaults are cracks in the crust of the Earth where the earth is moving apart, coming together, or slipping past each other. Each of these movements on the surface of the earth cause earthquakes. Home near the epicenter of the 1989 Loma Prieta earthquake . USGS...
In some instances, design faults most likely led to the buildings not being safe and earthquake resistant. In a lot of residential blocks, there are usually shops and retail units on the ground floor so columns are often removed leaving them without the extra support required for ...