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  2. Richter scale - Wikipedia

    en.wikipedia.org/wiki/Richter_scale

    Millions of minor earthquakes occur every year worldwide, equating to hundreds every hour every day. [15] On the other hand, earthquakes of magnitude ≥8.0 occur about once a year, on average. [15] The largest recorded earthquake was the Great Chilean earthquake of May 22, 1960, which had a magnitude of 9.5 on the moment magnitude scale. [16]

  3. Earthquake shaking table - Wikipedia

    en.wikipedia.org/wiki/Earthquake_shaking_table

    Earthquake shaking table at the National Technical University, Athens, Greece. There are several different experimental techniques that can be used to test the response of structures and soil or rock slopes to verify their seismic performance , one of which is the use of an earthquake shaking table (a shaking table , or simply shake table ).

  4. Tenderloin, San Francisco - Wikipedia

    en.wikipedia.org/wiki/Tenderloin,_San_Francisco

    After the 1989 earthquake damaged that facility, artists founded the Luggage Store Gallery at 1007 Market, at the intersection of 6th Street, Market, Taylor and Golden Gate Avenue. In 1989 the Tenderloin Reflection and Education Center (TREC) spun off from St Anthony foundation and operated a cultural center including dance, music, writing ...

  5. Modified Mercalli intensity scale - Wikipedia

    en.wikipedia.org/wiki/Modified_Mercalli...

    Earthquakes. The Modified Mercalli intensity scale ( MM, MMI, or MCS) measures the effects of an earthquake at a given location. This is in contrast with the seismic magnitude usually reported for an earthquake. Magnitude scales measure the inherent force or strength of an earthquake – an event occurring at greater or lesser depth.

  6. Seismic vibration control - Wikipedia

    en.wikipedia.org/wiki/Seismic_vibration_control

    Seismic vibration control. In earthquake engineering, vibration control is a set of technical means aimed to mitigate seismic impacts in building and non-building structures. All seismic vibration control devices may be classified as passive, active or hybrid[ 1] where: hybrid control devices have combined features of active and passive control ...

  7. Seismic magnitude scales - Wikipedia

    en.wikipedia.org/wiki/Seismic_magnitude_scales

    v. t. e. Seismic magnitude scales are used to describe the overall strength or "size" of an earthquake. These are distinguished from seismic intensity scales that categorize the intensity or severity of ground shaking (quaking) caused by an earthquake at a given location. Magnitudes are usually determined from measurements of an earthquake's ...

  8. Moment magnitude scale - Wikipedia

    en.wikipedia.org/wiki/Moment_magnitude_scale

    Earthquakes. The moment magnitude scale ( MMS; denoted explicitly with M or Mw or Mwg, and generally implied with use of a single M for magnitude [1]) is a measure of an earthquake 's magnitude ("size" or strength) based on its seismic moment. Mw was defined in a 1979 paper by Thomas C. Hanks and Hiroo Kanamori.

  9. Melissa Etheridge connects with incarcerated women in new ...

    www.aol.com/entertainment/melissa-etheridge...

    Melissa Etheridge realized two career dreams with her new docuseries “Melissa Etheridge: I’m Not Broken”: performing for incarcerated women and recording the concert for a live album. The ...

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