Stromboli is famously known as the “Lighthouse of the Mediterranean.” This nickname comes from its frequent, glowing eruptions that have been visible from great distances at sea for centuries. Sailors in ancient times used the red glow of its summit ...
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The highest concentration of active volcanoes is found around the Pacific Ocean. This region, the Pacific Ring of Fire, is home to over 450 volcanoes. This is due to the high number of subduction zones where the Pacific Plate interacts ...
Pyroclastics (or Tephra) are the fragmented materials—including ash, lapilli and volcanic bombs—ejected into the air during an explosive volcanic eruption. These fragments are formed from cooled lava and shattered pieces of the volcano’s internal structure that are blasted out by ...
S-waves are shear waves that move by displacing atoms perpendicular to the wave’s path. This requires “shear strength,” which only solids possess. Since the outer core is a liquid (molten iron and nickel), it has no shear strength, causing S-waves ...
According to global seismograph networks, approximately 8,000 to 10,000 earthquakes occur annually that are strong enough to be felt or recorded as significant events. While millions of tiny tremors happen every year, the majority are so small that they can ...