Category Archives: seismic activities

South Pacific Quake in Tonga Causes Tsunami

A powerful undersea earthquake struck off the south Pacific island of Tonga today and generated a tsunami capable of causing severe damage to the area, the U.S. Pacific Tsunami Warning Center reported.There were no reports of damage or of sea … Continue reading

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Scientist see holes in glacier at Alaska Volcano

ANCHORAGE, Alaska – Geologists monitoring Mount Redoubt for signs of a possible eruption noticed that a hole in the glacier clinging to the north side of the volcano had doubled in size overnight — and now spans the length of … Continue reading

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Plate Tectonic , Plate Boundaries and Mid Oceanic Ridge

Plate tectonics is a theory dealing with the dynamics of the Earth’s outer shell, the lithosphere. Resting on a broad synthesis of geologic and geophysical data, it dominates current thinking in the Earth sciences. According to the theory, the lithosphere … Continue reading

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Sesmic Waves, Earthqukes and Interior of the Earth

What Is Seismology? Seismology is the study of earthquakes and seismic waves that move through and around the earth. A seismologist is a scientist who studies earthquakes and seismic waves. What Are Seismic Waves? Seismic waves are the waves of … Continue reading

Posted in interior of the Earth, plate tectonics, seismic activities | 1 Comment