Seismic Waves
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Big Quake Strikes Japan Again: What Makes The Nation So Vulnerable
Japan was hit by a 7.4-magnitude earthquake on Monday, Japan's Meteorological Agency (JMA) said, issuing a tsunami warning for waves up to three metres (10 feet).
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1 Dead, Buildings Damaged In 7.4 Earthquake In Indonesia, Tsunami Warning Lifted
Indonesia Earthquake: The quake, which was initially recorded at a magnitude of 7.8, hit at a local time of 6:48 am (2248 GMT) in the Molucca Sea, USGS said.
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NASA’s Nancy Grace Roman Space Telescope Surpassing Expectations Even Before Launch, Reveals Research
NASA’s upcoming Roman Space Telescope is expected to measure seismic waves in over 300,000 red giant stars, far greater than early predictions. These signals will help scientists better understand exoplanet systems and the Milky Way’s ancient core. Researchers say Roman’s natural survey design enables this breakthrough even before the telesco...
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The Rise of 'Sonic Boom' Quakes: What Scientists Learned from Myanmar
The warning came while studying past earthquakes that struck California. These are called supershear, a rare phenomenon, that move faster than seismic waves.
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Meteor Strike May Have Triggered Massive Grand Canyon Landslide 56,000 Years Ago
A meteorite strike in northern Arizona may have triggered a massive Grand Canyon landslide 56,000 years ago. Researchers found ancient driftwood and lake sediments indicating a paleolake formed after the Colorado River was dammed. The study suggests seismic waves from the Meteor Crater impact caused the landslide. Findings were published in the jou...
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Why Alaska's Latest 7.3 Magnitude Earthquake Has Got Scientists' Attention
Wednesday's magnitude 7.3 earthquake off Alaska's Aleutian Islands chain struck in a region that has experienced a handful of powerful quakes within the last five years - including one that shook communities almost exactly two years earlier.
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Earthquake Of Magnitude 5.1 Hits Iran, Sparks Theories Of Nuclear Testing
The earthquake has now triggered a wave of speculations about whether Tehran has tested a nuclear weapon. It has also sparked concern because it struck near a city with a space and missile complex.
-
Seismic Mystery Solved: NASA’s SWOT Satellite Detects Greenland Mega-Tsunamis
In September 2023, a global seismic mystery puzzled scientists for nine days. New research now confirms it was caused by two mega-tsunamis triggered by landslides in East Greenland. The waves became trapped in a fjord, forming seiches that shook the Earth. Using cutting-edge data from NASA’s SWOT satellite, scientists detected these hidden waves ...
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Massive Continent-Sized Blobs Deep in Earth’s Mantle May Be Over a Billion Years Old
Massive mantle formations, called LLSVPs, have been found to be over a billion years old. These structures, sitting 3,000 km beneath the surface, slow seismic waves, indicating unique physical and compositional properties. Their stability suggests they influence Earth's geological processes, including volcanic activity and tectonic movements. Scien...
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Seismic Data from NASA’s InSight Might Solve the Mystery of Mars’ Dichotomy
NASA’s InSight mission has provided seismic data shedding light on the Martian dichotomy, the split between Mars’ northern lowlands and southern highlands. Findings from the mantle’s seismic wave analysis suggest the split stems from ancient tectonic activity and magma dynamics, rather than asteroid impacts. Variations in crust thickness and ...
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Ancient Geological Hotspot Linked to Great Lakes' Depth and Formation
New research reveals an ancient geological hotspot influenced the Great Lakes' formation millions of years ago. As North America drifted over this hotspot, the lithosphere weakened, enabling glacial forces during the Ice Age to carve the deep depressions of these massive lakes. Seismic data supports this theory, showing unusual wave movements benea...
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Earth’s Inner Core Might Be Slowing Down and Changing Shape, New Study Reveals
Research suggests Earth’s inner core, a metal sphere within the molten outer core, is slowing its spin and reshaping. Seismic wave analyses from earthquakes reveal discrepancies indicating deformation on the core’s surface or changes in rotation. John Vidale, a geophysicist from the University of Southern California, presented these findings, s...
-
Scientists Identify Seismic Trigger Before 2022 Tonga Eruption; Insight Could Improve Tsunami Warnings
A seismic wave recorded 15 minutes before the massive 2022 Tonga eruption could help scientists improve early-warning systems for remote oceanic volcanoes and mitigate tsunami risks. Researchers found that a rupture beneath the volcano’s caldera allowed seawater to mix with magma, triggering the eruption. This discovery may provide critical lead-...
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Scientists Unveil Doughnut-Shaped Structure Hidden In Earth's Outer Core
By analyzing seismic waves generated by large earthquakes, geophysicists identified a region where these waves slow down as they pass through the outer core.
-
Study Reveals Ultra-Low Velocity Zones May Be More Common in Earth's Mantle Than Previously Thought
A new study published in AGU Advances has unveiled intriguing findings about ultra-low velocity zones (ULVZs) in Earth's mantle, suggesting these mysterious features might be more widespread than previously thought.ULVZs, which are known to dramatically slow seismic waves by up to 50%, have long been associated with volcanic hotspots such as Hawaii...
-
Big Quake Strikes Japan Again: What Makes The Nation So Vulnerable
Japan was hit by a 7.4-magnitude earthquake on Monday, Japan's Meteorological Agency (JMA) said, issuing a tsunami warning for waves up to three metres (10 feet).
-
1 Dead, Buildings Damaged In 7.4 Earthquake In Indonesia, Tsunami Warning Lifted
Indonesia Earthquake: The quake, which was initially recorded at a magnitude of 7.8, hit at a local time of 6:48 am (2248 GMT) in the Molucca Sea, USGS said.
-
NASA’s Nancy Grace Roman Space Telescope Surpassing Expectations Even Before Launch, Reveals Research
NASA’s upcoming Roman Space Telescope is expected to measure seismic waves in over 300,000 red giant stars, far greater than early predictions. These signals will help scientists better understand exoplanet systems and the Milky Way’s ancient core. Researchers say Roman’s natural survey design enables this breakthrough even before the telesco...
-
The Rise of 'Sonic Boom' Quakes: What Scientists Learned from Myanmar
The warning came while studying past earthquakes that struck California. These are called supershear, a rare phenomenon, that move faster than seismic waves.
-
Meteor Strike May Have Triggered Massive Grand Canyon Landslide 56,000 Years Ago
A meteorite strike in northern Arizona may have triggered a massive Grand Canyon landslide 56,000 years ago. Researchers found ancient driftwood and lake sediments indicating a paleolake formed after the Colorado River was dammed. The study suggests seismic waves from the Meteor Crater impact caused the landslide. Findings were published in the jou...
-
Why Alaska's Latest 7.3 Magnitude Earthquake Has Got Scientists' Attention
Wednesday's magnitude 7.3 earthquake off Alaska's Aleutian Islands chain struck in a region that has experienced a handful of powerful quakes within the last five years - including one that shook communities almost exactly two years earlier.
-
Earthquake Of Magnitude 5.1 Hits Iran, Sparks Theories Of Nuclear Testing
The earthquake has now triggered a wave of speculations about whether Tehran has tested a nuclear weapon. It has also sparked concern because it struck near a city with a space and missile complex.
-
Seismic Mystery Solved: NASA’s SWOT Satellite Detects Greenland Mega-Tsunamis
In September 2023, a global seismic mystery puzzled scientists for nine days. New research now confirms it was caused by two mega-tsunamis triggered by landslides in East Greenland. The waves became trapped in a fjord, forming seiches that shook the Earth. Using cutting-edge data from NASA’s SWOT satellite, scientists detected these hidden waves ...
-
Massive Continent-Sized Blobs Deep in Earth’s Mantle May Be Over a Billion Years Old
Massive mantle formations, called LLSVPs, have been found to be over a billion years old. These structures, sitting 3,000 km beneath the surface, slow seismic waves, indicating unique physical and compositional properties. Their stability suggests they influence Earth's geological processes, including volcanic activity and tectonic movements. Scien...
-
Seismic Data from NASA’s InSight Might Solve the Mystery of Mars’ Dichotomy
NASA’s InSight mission has provided seismic data shedding light on the Martian dichotomy, the split between Mars’ northern lowlands and southern highlands. Findings from the mantle’s seismic wave analysis suggest the split stems from ancient tectonic activity and magma dynamics, rather than asteroid impacts. Variations in crust thickness and ...
-
Ancient Geological Hotspot Linked to Great Lakes' Depth and Formation
New research reveals an ancient geological hotspot influenced the Great Lakes' formation millions of years ago. As North America drifted over this hotspot, the lithosphere weakened, enabling glacial forces during the Ice Age to carve the deep depressions of these massive lakes. Seismic data supports this theory, showing unusual wave movements benea...
-
Earth’s Inner Core Might Be Slowing Down and Changing Shape, New Study Reveals
Research suggests Earth’s inner core, a metal sphere within the molten outer core, is slowing its spin and reshaping. Seismic wave analyses from earthquakes reveal discrepancies indicating deformation on the core’s surface or changes in rotation. John Vidale, a geophysicist from the University of Southern California, presented these findings, s...
-
Scientists Identify Seismic Trigger Before 2022 Tonga Eruption; Insight Could Improve Tsunami Warnings
A seismic wave recorded 15 minutes before the massive 2022 Tonga eruption could help scientists improve early-warning systems for remote oceanic volcanoes and mitigate tsunami risks. Researchers found that a rupture beneath the volcano’s caldera allowed seawater to mix with magma, triggering the eruption. This discovery may provide critical lead-...
-
Scientists Unveil Doughnut-Shaped Structure Hidden In Earth's Outer Core
By analyzing seismic waves generated by large earthquakes, geophysicists identified a region where these waves slow down as they pass through the outer core.
-
Study Reveals Ultra-Low Velocity Zones May Be More Common in Earth's Mantle Than Previously Thought
A new study published in AGU Advances has unveiled intriguing findings about ultra-low velocity zones (ULVZs) in Earth's mantle, suggesting these mysterious features might be more widespread than previously thought.ULVZs, which are known to dramatically slow seismic waves by up to 50%, have long been associated with volcanic hotspots such as Hawaii...
