A lahar is a type of mudflow or debris flow composed of a ...
Water manufacturing is the process to produce potable water ...
A whitish semicircular arc seen opposite the sun in fog. ...
An earthquake (also known as a quake, tremor or temblor) is ...
There is no consensus among volcanologists on how to define ...
Magma (from Greek μάγμα "mixture") is a mixture ...
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