Reducing+the+risk+-+volcanoes.

=Reducing the risk - volcanoes. = = = Scientists assess volcanic hazards based on a volcano’s past behavior. They carefully monitor volcanoes for signs of restlessness and inform the public about possible dangers. = = __ **__Volcano monitoring involves the recording__** __ •ground movements, •earthquakes,  •variations in gas compositions

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__ **__A seismometer__** __ measures ground vibrations caused earthquakes. __ **__Tiltmeter__** __ measures tiny changes in the slope angle or “tilt” of the ground  **GPS (satellites)** used for monitoring volcano deformation. <span style="background-color: transparent; color: #000000; direction: ltr; display: block; font-family: Times New Roman; font-size: 16px; margin-bottom: 0pt; margin-top: 0pt; text-align: left; text-decoration: none; unicode-bidi: embed; vertical-align: baseline;"><span style="color: #0e0ebe; font-family: Tahoma,Geneva,sans-serif; font-size: 120%;">__ **__Gas monitoring__** __ detects changes in the release of certain gases from a volcano, chiefly carbon dioxide and sulfur dioxide.

====<span style="background-color: #ffffff; color: #0e0ebe; direction: ltr; font-family: Tahoma,Geneva,sans-serif; font-size: 120%; margin-bottom: 0pt; margin-top: 0pt; text-decoration: none; unicode-bidi: embed; vertical-align: baseline;">__**Warning and evacuation.**__ When there is enough evidence of volcanic activity a town will be put on alert and then evcuated from area. ====