Sinkholes are defined as a depression or hole in the surface of the earth due to the erosion of the underlying ground layer. Such sinkholes develop over time with a diameter ranging between 1 – 600m.  Sinkholes can form on both land masses and ocean ground surfaces. They can have both, natural and anthropogenic (human made) causes. Most natural sink holes are often caused by erosion which can either be physical or chemical.


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Philippines: Geohazard maps for Typhoon Haiyan/Yolanda response

Typhoon Yolanda

The Mines and Geosciences Bureau (MGB) of the Department of Environment and Natural Resources (DENR) in the Philippines has elaborated geohazard maps for 131 out of the 171 cities and municipalities that were hit by the typhoon Haiyan -known as Yolanda by local communities- on 8 November 2014.


Publishing Date: 

Tue, 11/11/2014 - 11:21
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