The Philippine Institute of Volcanology and Seismology watches out for volcanoes, earthquakes, etc. and warns the people whenever they detect danger. They work hard for 24 hours a day to ensure the safety of the people.
A seismograph detects the seismic waves generated by earthquakes.
This seismogram is a graph output of a seismograph.
Luzon was struck by an earthquake on July 16, 1990.
Plate tectonics describe the large scale motions of Earth's lithosphere
Walang komento:
Mag-post ng isang Komento