21. StudyWeb MathematicsWeights MeasurementEarthquake Measurement Background Briefing Earthquake Richter Scale Gives step by step info on how to measure an earthquake with the Richter Scale. http://seismo.um.ac.ir/education/StudyWeb MathematicsWeights & MeasurementEa

22. 227 Earthquake Measurement Lesson Plans Reviewed By Teachers Search earthquake measurement lesson plans to find teacher approved lesson plans. Quickly find lesson plans that inspire student learning. http://www.lessonplanet.com/search?keywords=earthquake measurement&media=les

23. Earthquake Magnitude EARTHQUAKE MAGNITUDE SCALES Richter Magnitude Charles F. Richter introduced the Richter scale in 1935. The Richter magnitude is denoted as ML. It is also called the local magnitude. http://www.vibrationdata.com/earthquakes/magnitude.html

EARTHQUAKE MAGNITUDE SCALES Richter Magnitude Charles F. Richter introduced the Richter scale in 1935. The Richter magnitude is denoted as ML. It is also called the "local magnitude." It is based on the maximum excursion of the needle on the "Wood-Anderson seismograph." The Richter scale was intended for southern California earthquakes only. The Richter scale is a logarithmic scale. The earthquake wave displacement amplitude increases by a factor of 10 for every 1 unit increase of the Richter magnitude. The same 1 unit increase in magnitude, however, corresponds to an increase of approximately 32 times the earthquakes energy. The magnitude calculation depends on two parameters: 1. The maximum displacement indicated on the Wood-Anderson seismograph 2. The distance from the focus to the seismograph For example, a 23 millimeter displacement measured at a station 210 kilometers from the focus would have a value of ML = 5.0. A maximum displacement of 2.3 millimeters at this same station and distance would correspond to ML = 4.0. Finally, note that the displacement indicated on the Wood-Anderson seismograph is proportional to, but not equal to, the ground displacement. The sensitivity of the Wood-Anderson instrument must be known in order to calculate the true ground displacement. A typical amplification factor is 2080. The ground displacement is thus much smaller than the displacement indicated on the seismograph.

24. Earthquake Measurement : Abstract : Nature Nature is the international weekly journal of science a magazine style journal that publishes fulllength research papers in all disciplines of science, as well as News and Views http://www.nature.com/nature/journal/v31/n784/abs/031004b0.html

Jump to main content Jump to navigation nature.com homepage ... Login Search this journal all of nature.com Advanced search Journal home Archive Letters to Editor Abstract Letters to Editor nature doi Earthquake Measurement J. A. EWING Top of page Abstract IN an article on “Earthquakes” in last week's NATURE (p. 608), Dr. H. J. Johnston-Lavis takes exception to the records of earthquake motion which I have published, on the ground of their complexity, and pronounces the Plain of Yedo unsuitable for earthquake observations. Top of page Main navigation Journal content Journal home Advance online publication About AOP Current issue ... News Specials Journal information About the journal Contact the journal About the editors Nature family of journals ... Nature history NPG Services Advertising work@ npg For librarians NPG Resources Nature Reports Nature Network nature.com blogs Nature Conferences ... Scitable Genetics NPG Journals by Subject Area Chemistry Chemistry Drug discovery Biotechnology Materials ... Earth sciences Life sciences Biotechnology Cancer Development Drug discovery ... Systems biology Physical sciences Physics Materials by A - Z Index Extra navigation ARTICLE NAVIGATION - Full text Previous Next Table of contents Download PDF ... Cancer Genomics London Research Institute London United Kingdom Scientific Director, PERFORM Centre

25. Totally Cats: The Cat As Earthquake Measurement Device We had a minor (4.3) quake this morning, around 522 AM. The event was about 20 miles from the house, according to the USGS report that showed up in my emailbox a few minutes http://totallycats.blogspot.com/2007/10/cat-as-earthquake-measurement-device.htm

Totally Cats Wednesday, October 24, 2007 The Cat as Earthquake Measurement Device purring about... cat humor cats earthquakes We had a minor (4.3) quake this morning, around 5:22 AM. The event was about 20 miles from the house, according to the USGS report that showed up in my email-box a few minutes afterward. So, according to the USGS this was a minor event. According to The Cat, the sky is falling, the world as we know it is coming to an end, and let the Rapture begin. According to the USGS report, the epicenter was about 15 miles north and 3.2 miles underground. According to The Cat, the epicenter was in the front yard and just slightly below the caliche level that stunts the growth of the trees around the property (about 15 inches down). According to what I felt, the quake lasted just under 30 seconds. According to The Cat, it lasted just over four hours, and is probably still be going on. As soon as the event is over for The Cat, I will coax her down off the ceiling with a plate of tuna. With my luck, however, we'll have a goodly aftershock just as I open the can, and we'll never hear the end of it. California has had its share of natural and manmade disasters over the past few days. At this writing, our home turf is not in danger. We're keeping The Cat away from the tv set, though. She does tend to blow things out of proportion, and she'd probably figure out how to dial 9-1-1 whilst laboring under the delusion that the garage is ablaze.

26. Pioneers Of Earthquake Measurement: Giuseppe Mercalli | Earthquakes Today Most of us know practically nothing about the way earthquakes are measured. We have this mental image of weird little guys in lab coats scrutinizing mysterious http://earthquakes-today.com/earthquakes/earthquake-measurement/

Learn the latest information Skip to content Skip to content Home Forums ... Astronomy News Pioneers of Earthquake Measurement: Giuseppe Mercalli Posted on September 8, 2010 by admin Of course, the number While there are various scales used by scientists to study earthquakes, there are two that have held a prominent place in our culture for some time, contributing much to our understanding of these phenomena called earthquakes. While neither of these scales is still used in its original form, modernized versions of them underlie our basic understanding of earthquakes and the way we talk about them. These two scales are the Mercalli Scale and the Richter Scale. When discussing the modern science of earthquake measurement, a good place to start is Giuseppe Mercalli. Here was an interesting character, a Roman Catholic priest who got thrown out of the Natural Sciences department at the Milan Seminary because he openly voiced his liberal political views, only to rise to prominence again and become the director of the Vesuvius Observatory. Unfortunately, the purpose of this article is not biography, and we are only interested in Mercalli because of his crucial contribution to the field of earthquake science. I. Very mild movement, only detectable by instruments.

27. Magnitude 9.1 - OFF THE WEST COAST OF NORTHERN SUMATRA USGS Earthquake Hazards Program, responsible for monitoring, reporting, and researching earthquakes and earthquake hazards http://earthquake.usgs.gov/eqinthenews/2004/usslav/

28. Earthquakes - Energy Earthquake Measurement. Geologists use seismographs to measure earthquake waves, and use the Mercalli and Richter scales to report the relative size of earthquakes. http://www.iupui.edu/~g107cwt/10_earthquakes/energy/04.html

skip to the content Environmental Geology - G107 by IUPUI Department of Earth Sciences Earthquakes Earth Processes Unit Introduction Objectives Lecture Global View ... CASE STUDIES Earthquake Measurement Geologists use seismographs to measure earthquake waves, and use the Mercalli and Richter scales to report the relative size of earthquakes. Your textbook describes how these two scales function. Richter is based on analytical measurements, while Mercalli is based on historical and eyewitness accounts of shaking and damage. Seismographs An example of a seismograph recording the arrival of P-, S-, and R/L- waves from an earthquake. (Pearson/Prentice Hall) how seismographs work Sensitive seismographs can record earthquakes 1000s of miles away. Geologists use a method called triangulation to find the epicenter of earthquakes using seismographs. Using three seismograph stations, geologists can use the arrival time of the P- and S-waves to find the exact location of the epicenter Scales Richter Scale : Based on measurements from seismographs, these are always used in modern earthquakes. Reported as a magnitude (example: Magnitude 5 or M5 earthquake). The measurement is based on the largest amplitude(size) seismic wave measured for that earthquake.

29. Caltech Earthquake Engineering Research Laboratory Technical Reports - Strong-mo This paper presents results of a study of some of the characteristics of the Kinemetrics PDR1 digital strong-motion accelerograph. The paper gives the results of laboratory http://caltecheerl.library.caltech.edu/157/

Caltech Earthquake Engineering Research Laboratory Technical Reports Main About Browse Search ... Help Strong-motion earthquake measurement using a digital accelerograph Iwan, Wilfred D. and Moser, Michael Anthony and Peng, Chia-Yen Strong-motion earthquake measurement using a digital accelerograph. Technical Report CaltechEERL:1984.EERL-84-02 California Institute of Technology Full text available as: PDF Adobe PDF (3 MB) - Requires Adobe Acrobat Reader or other PDF viewer. Abstract This paper presents results of a study of some of the characteristics of the Kinemetrics PDR-1 digital strong-motion accelerograph. The paper gives the results of laboratory tests of the background noise level of the instrument and compares these results with previously reported observations for optical instruments. The determination of displacement from acceleration data is discussed and results of laboratory tests are presented. Certain instrument anomalies are identified, data correction algorithms proposed, and examples given. The paper also presents the results of a comparison of earthquake records obtained from side-by-side digital and optical analog instruments. Finally, some results obtained from a recent Chinese earthquake are discussed. EPrint Type: Monograph (Technical Report) Additional Information: PB-91-170191/AS Subjects: All Records Earthquake Engineering Research Laboratory ID Code: Deposited By: Jim O'Donnell Deposited On: 19 February 2008 Record Number: CaltechEERL:1984.EERL-84-02

30. Earthquake Measurement Online - Sky’s Blog This is more fun than any sporting event. The US Geological Survey long ago automated their earthquake reporting instruments and it has become somewhat of a sport to see how http://blog.red7.com/earthquake-measurement-online/

Sky’s Blog Spreading the word in a networked world the Foundation the photos projects the Social Graph of Malware ... Earthquake Measurement Online by Sky on Mar.30, 2009, under Entertainment and Places The Quantified Self Read more about what the USGS has available online for earthquake reporting. Here’s what the event looked like on the seismograph at Stanford Telescope in the hills west of Stanford University ( click this for full original recording of this quake Then a map is assembled (again, by computers) showing (with color) the intensity as felt by those who reported the quake. The map shows zip code area outlines and colors them to represent the reported intensity. ( Click the map to see an original .) If you look at the map for this particular quake you’ll see that the shock was felt mostly northwest and southeast along the major fault lines in our area. A friend in Santa Cruz on the coast reported to me that he didn’t feel the quake at all. In case you non-Californians are wondering, a quake this size may not even make the TV news. It’s strong enough to be felt, but causes no damage. They occur maybe several times a month if you consider the state as a whole. As I was out hiking yesterday I was thinking it has been just about 20 years now since the Loma Prieta quake of 1989. We have a quake that you can feel maybe once or twice a year, but so far nothing even alarming for 20 years.

31. Earthquakes In Japan Earthquake measurement. The Japanese shindo scale for measuring earthquakes is more commonly used in Japan than the Richter scale to describe earthquakes. http://www.japan-guide.com/e/e2116.html

document.write(spod.nickname); document.write(spod.quote); document.write(spod.nickname); document.write(spod.quote); document.write(spod.nickname); document.write(spod.quote); Meet new friends, find pen-pals and language learning partners, or meet your ideal match! Travel Living A-Z ... Questions Search this site Apartment Search Area: All Areas (Tokyo) Minato-ku Shibuya-ku Chuo-ku Shinjuku-ku Bunkyo-ku Chiyoda-ku Meguro-ku Setagaya-ku Shinagawa-ku Oota-ku Suginami-ku Nakano-ku Koto-ku Taito-ku Sumida-ku Toshima-ku Nerima-ku Monthly rent: to no max. Yen Bedrooms (multiple selections possible): Studio 4BED or more Related Pages Living in Japan Travel Geography Great Kanto Earthquake 1923 ... Kobe Earthquake Museum Survey If you had a choice, through which airport would you prefer to enter Japan? Narita Airport (Tokyo) Haneda Airport (Tokyo) Kansai Airport (Osaka) Central Japan Airport (Nagoya) Fukuoka Airport New Chitose Airport (Sapporo) see results Other Surveys: Tsukiji Market Favorite hotel reservation website Favorite travel guide books How to improve tourism ... Have you recently entered Japan? japan-guide.com newsletter Keeping you up to date on Japan travel and living related issues and site updates.

32. Earthquake Despite their slow speed, these waves are particularly destructive to human construction because they cause considerable ground movement. Earthquake Measurement http://www.eoearth.org/article/Earthquake

@import url(/themes/newbase/css/print.css); Encyclopedia of Earth Articles Earthquake Sign up ... SITE FEED Earthquake document.getElementById('lightbox').style.display = 'none'; Earthquake Published: July 18, 2010, 2:05 pm Edited: July 18, 2010, 2:05 pm Lead Author: Michael Pidwirny Topics: Geology Rate: Content Source: USGS This article has been reviewed by the following Topic Editors: William Heins Galal Hassan Galal Hussein C Michael Hogan PhD. Introduction An earthquake is a sudden vibration or trembling in the Earth. More than 150,000 tremors strong enough to be felt by humans occur each year worldwide. Earthquake motion is caused by the quick release of stored potential energy into the kinetic energy of motion. Most earthquakes are produced along faults, tectonic plate boundary zones, or along the mid-oceanic ridges (Figures 1 and 2). At these areas, large masses of rock that are moving past each other can become locked due to friction. Friction is overcome when the accumulating stress has enough force to cause a sudden slippage of the rock masses. The magnitude of the shock wave released into the surrounding rocks is controlled by the quantity of stress built up because of friction, the distance the rock moved when the slippage occurred, and ability of the rock to transmit the energy contained in the seismic waves. The San Francisco earthquake of 1906 involved a 6

33. Facts About Modified Mercalli Intensity Scale: Earthquakes, As Discussed In Brit Facts about Modified Mercalli Intensity Scale earthquakes, as discussed in Britannica Compton's Encyclopedia earthquake Measurement http://www.britannica.com/facts/11/827757/Modified-Mercalli-Intensity-Scale-as-d

document.write(''); Search Site: Advanced Search With all of these words With the exact phrase With any of these words Without these words Home SHOP BROWSE BLOG ... HELP Username: Password: Remember me Forgot your password? Help Email " is the e-mail address you used when you registered. Password " is case sensitive. If you need additional assistance, please contact customer support Enter the e-mail address you used when enrolling for Britannica Premium Service and we will e-mail your password to you. FEEDBACK Did you know... Facts about Modified Mercalli Intensity Scale: earthquakes, as discussed in Britannica Compton's Encyclopedia earthquake: Measurement The strength of an earthquake may be measured either by the amount of damage done or through calculations using various instrument readings. The Modified Mercalli Intensity Scale is commonly used to determine the amount of destruction caused by an earthquake. It defines 12 levels of earthquake strength. Get Random Facts About Us RSS Feeds E-mail Updates ... MORE... Britannica Content: Britannica Kids Test Prep Syndication International Publishing ... Magazines Other Britannica sites: Australia France India Korea ... SHARE Save to My Workspace All of the media associated with this article appears on the left. Click an item to view it.

34. Analysis Of Earthquake Recordings Obtained From The Seafloor Earthquake Measurem Analysis of earthquake recordings obtained from the Seafloor Earthquake Measurement System (SEMS) instruments deployed off the coast of southern California http://www.bssaonline.org/cgi/content/abstract/89/1/260

35. Buy.com - Earthquake Measurement (1883) Ewing, James Alfred : ISBN 33094 Find, shop, and buy computers, laptops, books, dvd, videos, games, video games, music, sporting goods, software, electronics, digital cameras, camcorders, toys, luggage, and http://www.buy.com/prod/earthquake-measurement-1883/q/loc/106/212678445.html

36. Earthquakes The California Geological Survey studies earthquakes to help Californians plan and build earthquake resistant communities. We record the strong ground motion from earthquakes http://www.consrv.ca.gov/cgs/geologic_hazards/earthquakes/Pages/index.aspx

37. Earthquake Measurement: Question Preview Preview questions found in the review game data set titled Earthquake Measurement Chapter 5 , Section 2 http://reviewgamezone.com/preview.php?id=208

38. Himselp.Net.In - Home Page The Himalayan School Earthquake Laboratory Programme (HIMSELP) is one of the important components of the Mission Mode Project of Department of Science Technology, Govt. of India. http://www.himselp.net.in/earthquakemeasurement.html

Menu: Introduction Seismic Activity Seismic Station Earthquake ... Contact Us Student's Corner Himalayan Earthquakes Kangra(1905) Bihar-Nepal(1934) Bihar-Nepal(1988) Uttarkashi(1991) ... Chamoli(1999) EarthQuake Sites ASC-INDIA.ORG USGS.GOV FEMA.GOV BGS.AC.UK Earthquake Measurement HOW TO MEASURE THE SIZE OF EARTHQUAKE? The severity of an earthquake can be expressed in terms of both magnitude and intensity . However, the two terms are quite different, and they are often confused. INTENSITY Intensity is defined as the degree of damage.It is based on the observed effects of ground shaking on people, buildings, and natural features. It varies from place to place within the disturbed region depending on the location of the observer with respect to the earthquake epicenter. Intensity scale: Rossi Forrels scale Modified Mercalli Scale MSK Scale EMS Scale (**********add link for reference) MAGNITUDE Magnitude is related to the amount of seismic energy released at the hypocenter of the earthquake. It is based on the amplitude of the earthquake waves recorded on instruments which have a common calibration. The magnitude of an earthquake is thus represented by a single, instrumentally determined value. Richter developed a scale using the amplitudes recorded during earthquake with standard Wood Anderson seismograph in California .Richter magnitude scale is a logarithamic scale .An increase in magnitude by 1 means 10 times higher wave amplitude and about 30 times higher energy release .Earthquake magnitude can be expressed in terms of energy of TNT.

39. Earthquake Measurement Games (ID: 208) Review Games Chapter 5 , Section 2 Chapter 5 , Section 2. Linked to NJ state standards at the 6th 7th grade level. http://reviewgamezone.com/game.php?id=208

40. USGS Science Topics: Real-time Monitoring And Reporting Provides links to USGS information about realtime monitoring and reporting and earthquakes. Provides a topical browse interface into USGS information utilizing controlled http://www.usgs.gov/science/combine.php?term=1351&with=304

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