Five tremors registered in Mt. Guagua Pichincha
Quito, May 23 --(EFE)-- Five earthquakes and 41 hybrid events were registered
Sunday in Mt. Guagua Pichincha, which rises above the Ecuadorian capital, the
Geophysical Institute of the National Polytechnic School announced.
A water vapor explosion was followed by a brief tremor Saturday at 11:44
(0444 GMT), a press release sent to EFE explained.
The explosion spewed ashes to the north and west of the crater and some
were displaced on the mountain's northwestern face.
Hybrid events are a mixture of volcanic and tectonic earthquakes, which
rupture of rocks and long-lasting tremors as a result of movements of fluids under
Quito's city government has had a yellow alert in effect in the area
October, when ``abnormal activity'' was first reported in the volcano.