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The Richter magnitude of an earthquake is determined from the amplitude of seismic waves recorded by seismographs. Specifically, it measures the height of the largest wave produced by the earthquake on the seismogram. Additionally, the distance between the seismograph and the earthquake's epicenter is taken into account to calculate the magnitude accurately. This scale quantifies the energy released during an earthquake.
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How many numbers are there on the Richter Scale?
The Richter scale has no theoretical upper or lower limit, in practical terms however the lowest level is dependent on the sensitivity of modern seismometers. As their sensitivity increases the minimum possible Richter magnitude will decrease. The maximum practical earthquake magnitude that the Richter scale can detect is a magnitude 8.0 event.
How is the intensity and magnitude of an earthquake measured?
Earthquakes are measure with a seismograph which indicates the intensity of earth crust´s movements this measurement is call Richter 1 being less intensity and 10 being major intensity.
Is there a scale for the severity of the tsunami?
The scale for a Tsunami is a Richter Scale. The Richter Scale is a scale that measures earthquakes, and Tsunamis are normally made by earthquakes. But be careful, because Tsunamis are normally formed by 6.5's or greater on the Richter Scale. -I hope I helped Actually, the Richter Scale is invalid, and we do not use it any more. The scale we use today is the MMS, or Moment Magnitude Scale. In the MMS, every point up the scale (Which goes from 1-10), multiplies it's magnitude by 30.
When and where has there been a major earthquake in the past months?
There were 2 major Earthquakes: 1)Haiti: Happened on January 12 and lasted 35 seconds. The earthquake was a 7.0 on the Richter Scale, and has caused major damage to the country. The USA has helped a lot, including the remake of "We Are The World" written by Micheal Jackson in the 1980's. 2) Chili: This earthquake was an 8.8 on the Richter scale and struck on February 27, 2010. Many earthquakes have happened around the country since the 1st earthquake.
What are the biggest earthquakes ever recorded?
The 1960 Valdivia earthquake or Great Chilean Earthquake of 22 May 1960 is to date the most powerful earthquake ever recorded on Earth, rating 9.5 on the moment magnitude scale. It occurred in the afternoon and its resulting tsunami affected southern Chile, Hawaii, Japan, the Philippines, eastern New Zealand, southeast Australia, and the Aleutian Islands in Alaska
How many numbers are there on the Richter Scale?
The Richter scale has no theoretical upper or lower limit, in practical terms however the lowest level is dependent on the sensitivity of modern seismometers. As their sensitivity increases the minimum possible Richter magnitude will decrease. The maximum practical earthquake magnitude that the Richter scale can detect is a magnitude 8.0 event.
How is the intensity and magnitude of an earthquake measured?
Earthquakes are measure with a seismograph which indicates the intensity of earth crust´s movements this measurement is call Richter 1 being less intensity and 10 being major intensity.
The strength of an earthquake is described in the terms of?
The strength of an earthquake is more correctly termed it's magnitude and is measured using a magnitude scale. Currently seismologists use the moment magnitude scale (which was developed to replace the Richter scale in the 1970's). The magnitude sclae is a way of representing the energy emitted during an earthquake. The damage and perceived ground shaking in an earthquake is known as it's intensity and this is measured using the Modified Mercalli scale or (in Europe) the Macroseismic scale. For more information on the types of magnitude and intensity scales, please see the related questions.
Magnitude of an earthquake at Virtual Earthquake?
This only works if you choose the city San Francisco area.Eureka, CA Seismic Station S-P Interval = 50 secElko, NV Seismic Station S-P Interval = 72 secLas Vegas, NV Seismic Station S-P Interval =64 secThen click to the next screen and enter:Eureka, CA- Epicentral Distance = 482/kmElko, NV- Epicentral Distance = 700/kmLas Vegas, NV- Epicentral Distance = 622/kmThen click until you can enter more numbers:Eureka, CA Maximum S Wave Amplitude= 290Elko, NV Maximum S Wave Amplitude= 60Las Vegas, NV Maximum S Wave Amplitude= 100Then type in:My estimate for the Richter magnitude of this earthquake = 7.0Then click enter and there you go! Simply enter your name and send to your teacher :)Its really not that hard once you figure it out but if you dont want to learn anything, take the easy way out!
Is there a scale for the severity of the tsunami?
The scale for a Tsunami is a Richter Scale. The Richter Scale is a scale that measures earthquakes, and Tsunamis are normally made by earthquakes. But be careful, because Tsunamis are normally formed by 6.5's or greater on the Richter Scale. -I hope I helped Actually, the Richter Scale is invalid, and we do not use it any more. The scale we use today is the MMS, or Moment Magnitude Scale. In the MMS, every point up the scale (Which goes from 1-10), multiplies it's magnitude by 30.
How is the magnitude of earthquakes calculated?
The moment magnitude scale (MW) provides an estimate of the total energy released in an earthquake and is currently the preferred magnitude scale in use by seismologists .It is calculated from the seismic moment (M0 - which has the unit of dynes/cm =where 1 dyne/cm = 1x10-7 N/m) which is a measure of the total energy released during an earthquake and is derived based on the elastic moduli of the crust where the earthquake occurred, the length of the slip surface and the cross sectional area of the slip surface as follows:M0 = G x AFx DFWhere:G = Shear modulus of the rock massAF = Area of the rupture along the faultDF = average displacement on AFIn order to make the moment magnitude scale (Mw) consistent with older magnitude scales such as the Local Moment (or "Richter") scale the seismic moment (M0) is converted into a logarithmic scale using the following equation:Mw = 2/3 x log10 x (M0) - 10.7This ultimately yields a dimensionless number and as such, Moment Magnitude has no units.Please see the related question.
Is the 2011 Japan earthquake the worst in history?
No, but it is the worst in Japan this century. The last big earthquake of this magnitude was in the early 1900's.
When and where has there been a major earthquake in the past months?
There were 2 major Earthquakes: 1)Haiti: Happened on January 12 and lasted 35 seconds. The earthquake was a 7.0 on the Richter Scale, and has caused major damage to the country. The USA has helped a lot, including the remake of "We Are The World" written by Micheal Jackson in the 1980's. 2) Chili: This earthquake was an 8.8 on the Richter scale and struck on February 27, 2010. Many earthquakes have happened around the country since the 1st earthquake.
What are the biggest earthquakes ever recorded?
The 1960 Valdivia earthquake or Great Chilean Earthquake of 22 May 1960 is to date the most powerful earthquake ever recorded on Earth, rating 9.5 on the moment magnitude scale. It occurred in the afternoon and its resulting tsunami affected southern Chile, Hawaii, Japan, the Philippines, eastern New Zealand, southeast Australia, and the Aleutian Islands in Alaska
The distance between a seismic station and the earthquake epicenter is determined from the?
The difference in arrival times of P and S waves.
What was the strength of the earthquake in Chile?
The Earthquake in Chile was 819 times stronger than the one in Haiti.Haiti measured 7.0 in the Moment magnitude scale (which is the ONLY scale used to measure quakes these days. The Richter scale has not been used since the 70's...) while Chile measured 8.8. This is a Logarithmic scale which grows exponentially. Thus, a quake measuring 7.0 is 32 (not 10) times stronger than one measuring 6.0, and so on...So, 8.0 is 32 times stronger than 7.0; and 8.8 is 25.6 times stronger than 8.0.32 x 25.6 = 819.2How_big_was_haiti_earthquake_compared_to_Chile_earthquake
How is the distance between the seismic station and the earthquake epicenter determined?
The distance between a seismic station and the earthquake epicenter is determined from the S-P interval, which is the time difference between the time of arrival of the first P wave and the first S wave.
