A low earthquake is 1-3 magnitude, a medium earthquake is 4-6 magnitude and a high earthquake is 7+ magnitude.
No. A 7.0 magnitude quake would be considered a "major" quake.
Here is the scale of earthquake magnitude classes:
ClassMagnitudeGreat8 or moreMajor7 - 7.9Strong6 - 6.9Moderate5 - 5.9Light4 - 4.9Minor3 -3.9
Seismic, or earthquake waves travel through the earth. They may travel through our crust, which is rocky, or through the more fluid parts, like the mantle, but the medium is the earth.
The "moment" magnitude of an earthquake is a measure of how much energy is released when an earthquake occurs. It is derived from the stiffness or rigidity of the rock mass around the fault rupture zone, the length of the fault that moved and the cross sectional area of the fault zone. Seismologists can also estimate its value based on the amplitude of seismic waves recorded on a seismometer. The Richter scale (currently used to measure small and medium strength earthquakes with magnitudes below 7.0 - larger earthquakes magnitudes are measured using the moment magnitude scale as described above) is also a measure of the amount of energy released by an earthquake and is derived based on the maximum amplitude of the seismic waves as recorded on seismometers.
There was a big earthquake in 2010 in Haiti. The earthquake was 7.0
earthquake aftershocks
According to several US news agencies (c.g. CBSNEWS), the USGS provided a comparison to help people gain perspective of Japan's recent earthquake.It was cited that"USGS compared Japan's earthquake with two well known quakes: last year's earthquake in Haiti and the historic 1906 San Francisco quake.The USGS calculated the magnitude 8.9 earthquake in Japan [on March 11, 2011] to be 700 times stronger than Haiti's recent magnitude 7.0 earthquake, which devastated Port-au-Prince and killed more than 300,000 people.When comparing to the San Francisco magnitude 7.9 earthquake in 1906, the USGS has figured that Japan's earthquake is equivalent to 30 times stronger."
Earth is the medium for earthquake waves.
Rock.
The Earth itself is.
Rock, soil, etc.
Level 70
the answer is 70$
An example of an earthquake focus is the point underground where the seismic energy is released, causing the earthquake. This focus can vary in depth from shallow (less than 70 km) to intermediate (70-300 km) to deep (greater than 300 km) within the Earth's crust.
Earthquake.
A medium-sized pickle typically weighs around 70-80 grams.
A mechanical wave is a disturbance (an oscillation) that moves through a medium. The source transfers mechanical energy into the medium itself, and the medium propagates the energy of the wave. Examples are sound and an earthquake, and a tsunami.
Small-65-70 Medium-70-80 Tall-80......
Since an earthquake or seismic wave is a pressure or force wave (like sound waves), it requires a material in which to propagate. So, no earthquake waves can travel through a vacuum.