Created by Charles Richter in 1935, the Richter Scale is an internationally recognized way of measuring the magnitude of a quake. Each full point on the scale is an increase in magnitude of 10 times. This means that a 5.0 earthquake is 10 times more powerful than a 4.0 earthquake, which i...
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...
Earthquakes are not uncommon in the U.S., andaround 16 earthquakeswith a magnitude of 7.0 or higher occur on average each year. The aftermath can lead to expensive building repair and replacement costs. A joint study from the U.S. Geological Survey (USGS) and the Federal Emergency Management...
Thousands of temblors occur every day. Here’s what you need to know about where they usually take place and how they're measured.
San Francisco 1906: The earthquake that shook up seismology On April 18, 1906, San Francisco experienced a magnitude 7.9 earthquake. The quake and the fires it caused destroyed a large portion of the city by the bay. Earthquakes are the natural result of movements by tectonic plates in our ...
Earthquakes are not uncommon in the U.S., and around 16 earthquakes with a magnitude of 7.0 or higher occur on average each year. The aftermath can lead to expensive building repair and replacement costs. A joint study from the U.S. Geological Survey (USGS) and the Federal Emergency Manage...
---two pictures in warming-up: tangshan earthquake and san francisco earthquake. q: what do you know about these two earthquakes? step3: listening 1. pre-listening ---brief introduction of san francisco earthquake q: when did the quake happen? --- 1906 q: what damage did bring about?
A 4.7 magnitude earthquake just struckHawaii's Big Islandon Thursday morning, and Japan has warned its citizens that a "megaquake" could strike within decades. But what does that mean, and what causes earthquakes? And what should someone do if they find themselves in one?
San Francisco residents, as well as the city's many distant admirers, take heed: The 1989 earthquake, which killed 67, shook the World Series, and caused $7 billion in economic damages, did not stem from a rupture in the San Andreas Fault.Spanberg, Erik...
You don't have to have a degree in structural engineering to be ready for the next powerful earthquake. Identify and fortify your home’s vulnerability against this risk. California is earthquake country. Join the thousands of people who have already discovered the benefits of a retrofit andstren...