What are 4 things that can cause an earthquake?
Things that cause earthquakes
- Groundwater extraction – decrease in pore pressure.
- Groundwater – increase in pore pressure.
- Heavy rain.
- Pore fluid flow.
- High CO2 pressure.
- Building dams.
- Earthquakes.
- No earthquakes (Seismic quiescence)
What do the dot colors indicate hint look at the legend at the bottom of the page?
What do the dot colors indicate? (Hint: Look at the legend at the bottom of the page.) The circle colors indicate when the earthquakes occurred. For example, red is most recent, within the hour. The circle sizes indicate the magnitudes of the earthquakes.
Where do earthquakes generally occur?
The Earth’s crust (the outer layer of the planet) is made up of several pieces called tectonic plates and most earthquakes occur along their edges. The plates under the oceans are called oceanic plates. Plates that are not under the ocean are continental plates.
What are the causes of earthquake PDF?
When two plates meet and try to slide past each other or push against each other, pressure can build below the surface. This pressure builds until it is too strong and must be released. The plates shift suddenly, energy is released, and shock waves are sent out that produce an earthquake.
What causes earthquakes PDF?
Is there a direct relationship between where earthquakes occur and where plate boundaries located?
Most earthquakes occur at the boundaries where the plates meet. In fact, the locations of earthquakes and the kinds of ruptures they produce help scientists define the plate boundaries.
Why do you think earthquakes occur in certain places more often?
Why do so many earthquakes originate in this region? The belt exists along boundaries of tectonic plates, where plates of mostly oceanic crust are sinking (or subducting) beneath another plate. Earthquakes in these subduction zones are caused by slip between plates and rupture within plates.
What boundaries cause earthquakes?
About 80% of earthquakes occur where plates are pushed together, called convergent boundaries. Another form of convergent boundary is a collision where two continental plates meet head-on. When two tectonic plates slide past each other, the place where they meet is a transform or lateral fault.
What is an earthquake and how does it happen?
What is an earthquake? An earthquake is what happens when two blocks of the earth suddenly slip past one another. The surface where they slip is called the fault or fault plane.
How can I teach about earthquakes in geography?
Today, earthquakes are often predicted as is the potential destruction they may cause. During a geology lesson consider taking a day or two to study the science of earthquakes. Discuss why they happen and how scientists measure and predict them. Teacher Planet can help.
What is the surface of the Earth where an earthquake occurs?
The surface where they slip is called the fault or fault plane. The location below the earth’s surface where the earthquake starts is called the hypocenter, and the location directly above it on the surface of the earth is called the epicenter.
How do scientists find out where an earthquake happened?
If they draw a circle on a map around the station where the radius of the circle is the determined distance to the earthquake, they know the earthquake lies somewhere on the circle. But where? Scientists then use a method called triangulation to determine exactly where the earthquake was (figure 6).