WhatIsanEarthquake? 1 ❶AnearthquakeisthevibrationofEarthproducedbytherapidreleaseofenergy.Mostoften, earthquakesarecausedbyslippagealongafaultinEarth’scrust.Theenergyreleasedradiatesinall directionsfromitssource,calledthefocus,intheformofwaves.Thesewavesareanalogousto...
an earthquake is the result of a sudden release of energy in the earth's crust that creates seismic waves(地震波). earthquakes are recorded with a seismometer(地震检波器), also known as a seismograph(地震仪). the moment magnitude of an earthquake is conventionally reported, or the related an...
An earthquake (also known as a quake, tremor or temblor) is the result of a sudden release of energy in the Earth’s crust that creates seismic waves. The largest earthquakes in historic times have been of magnitude slightly over 9, although there is no limit to the possible magnitude. Th...
In geology, a focus is a place where an earthquake begins. It is located below the ground where the rock layers suddenly move and even fracture. Most...Become a member and unlock all Study Answers Start today. Try it now Create an account Ask a question Our experts can answer your ...
W: Well, in the rescue attempts our first and most important goal is to save lives, for example at an earthquake site. So we use search and rescue vehicles and trained dogs to look for anyone who is still alive and try our best to save them. P: Sounds like a very challenging ...
What is an Earthquake? - Definition & Explanation from Chapter 21 / Lesson 14 44K An earthquake refers to the sudden shaking of the ground due to the presence of seismic waves. Learn more about fracture, fault, elastic rebound, seismic waves, and other concepts related to the occu...
3)对他来说完成作业很容易It is ___ for him ___. Step7Grammar Focus Read and translate the sentences and try to concludethegrammar in the sentences. 1. What were you doing at eight last night?I was taking a shower. 2. What was...
dampers (shock absorbers) in a car's suspension. If the wind or an earthquake wobbles the building one way, the damper tries to stay where it is, dragging on the hydraulics and effectively pulling the building back again. Note that the sway of the building is greatly exaggerated in this ...
Now that we've covered some basics on what causes earthquakes, let's talk a little about how they are measured. The most popular type of measurement of an earthquake is called the Richter Scale. Created by Charles Richter in 1935, the Richter Scale is an internationally recognized way of me...
Focus (Geology) The point of origin of an earthquake. Focus (Mathematics) A fixed point whose relationship with a directrix determines a conic section. Focus To cause (light rays, for example) to converge on or toward a central point; concentrate. Focus To render (an object or image) in ...