What do you think the origin of the broad, flat surface is above the coastal cliffs shown below?9/25/2023 ![]() At the higher end, these quakes can be destructive to cities. A magnitude of 3 to 5 is considered minor, while a quake with a magnitude of 5 to 7 is moderate to strong. ![]() Įarthquakes with magnitudes less than 3 occur every day, and are generally not felt by people. ![]() The moment magnitude scale provides a better idea of the shaking and possible damage from earthquakes of all kinds around the world. Instead, they rely on a tool known as a seismograph, which measures seismic waves, or vibrations, from an earthquake.Īn earthquake's magnitude is ranked on the moment magnitude scale, not the Richter scale. Because these faults extend from the surface down to several miles deep, geologists can't simply visit the source to calculate these numbers. (Image credit: AP Photo/Eric Skitzi) Measuring earthquakesĪn earthquake's size, or magnitude, depends on how large its parent fault is and how much it has slipped. The Malaysian government on Wednesday canceled New Year celebrations nationwide, urging people to pray this weekend that the country will be spared from future disasters such as the recent tsunamis that killed at least 65 Malaysians. The resort hotel lifeguards noticed waves were huge and sounded warning to all tourists around the hotel beach area to run to the safety area. In this photo taken by a tourist Eric Skitzi from England, tourists watch as tsunami waves hit the shore from a safe place inside Casuarina Beach Hotel resort in Penang, northwestern Malaysia around 1:00pm in local time (0500GMT) Sunday, Dec.
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