Answer:
15. Seismologists are Earth scientists, specialized in geophysics, who study the genesis and the propagation of seismic waves in geological materials.
16. The energy in seismic waves that cause the ground to shake. Heat energy associated with friction on the fault slip surface. Gravitational potential energy (the energy stored when lifting something off the ground, for example) may change as a result of the earthquake.
17. The location below the earth's surface where the earthquake starts is called the hypocenter, and the location directly above it on the surface of the earth is called the epicenter. Sometimes an earthquake has foreshocks. These are smaller earthquakes that happen in the same place as the larger earthquake that follows.
19.The focus is the place inside Earth's crust where an earthquake originates. The point on the Earth's surface directly above the focus is the epicenter.
20.The Philippine Institute of Volcanology and Seismology (PHIVOLCS) is a service institute of the Department of Science and Technology (DOST) that is principally mandated to mitigate disasters that may arise from volcanic eruptions, earthquakes, tsunami and other related geotectonic phenomena.
21. The Richter magnitude of an earthquake is determined from the logarithm of the amplitude of waves recorded by seismographs.
22. A seismograph or seismometer is the measuring instrument that creates the seismogram.
23.Two types of volcanically generated earthquakes are volcano-tectonic (VTs) earthquakes and long period earthquakes (LPs). Please visit our volcano seismicity pages to learn about volcanic activity near our Cascade Volcanoes. Volcanic-tectonic earthquakes (VTs) are, simply put, caused by slip on a fault near a volcano.
24.An earthquake is the vibration, sometimes violent, of the Earth's surface that follows a release of energy in the Earth's crust. This energy can be generated by a sudden dislocation of segments of the crust, by a volcanic eruption, or event by manmade explosions.
Explanation:
Hindi Kuna alam Yung number 18
