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  2. Earthquake environmental effects - Wikipedia

    en.wikipedia.org/wiki/Earthquake_environmental...

    Earthquake environmental effects are divided into two main types: Coseismic surface faulting induced by the 1915 Fucino, Central Italy, earthquake. Primary effects: which are the surface expression of the seismogenic source (e.g., surface faulting), normally observed for crustal earthquakes above a given magnitude threshold (typically M w =5.5 ...

  3. Earthquake - Wikipedia

    en.wikipedia.org/wiki/Earthquake

    Earthquakes can cause fires by damaging electrical power or gas lines. In the event of water mains rupturing and a loss of pressure, it may also become difficult to stop the spread of a fire once it has started. For example, more deaths in the 1906 San Francisco earthquake were caused by fire than by the earthquake itself. [72]

  4. Environmental Seismic Intensity scale - Wikipedia

    en.wikipedia.org/wiki/Environmental_Seismic...

    The Environmental Seismic Intensity scale (ESI 2007) [1] is a seismic scale used for measuring the intensity of an earthquake on the basis of the effects of the earthquake on the natural environment (Earthquake Environmental Effects).

  5. Focal mechanism - Wikipedia

    en.wikipedia.org/wiki/Focal_mechanism

    The data for an earthquake is plotted using a lower-hemisphere stereographic projection. The azimuth and take-off angle are used to plot the position of an individual seismic record. The take-off angle is the angle from the vertical of a seismic ray as it emerges from the earthquake focus.

  6. Fire extinguisher - Wikipedia

    en.wikipedia.org/wiki/Fire_extinguisher

    An empty fire extinguisher which was not replaced for years. Most countries in the world require regular fire extinguisher maintenance by a competent person to operate safely and effectively, as part of fire safety legislation. Lack of maintenance can lead to an extinguisher not discharging when required, or rupturing when pressurized.

  7. Strange light phenomenon seen before some earthquakes is a ...

    www.aol.com/news/strange-light-phenomenon-seen...

    Reports of “earthquake lights,” like the ones seen in videos captured before Friday’s 6.8-magnitude earthquake in Morocco, go back centuries to ancient Greece.