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板块内地震或与地幔对流有关
板块内地震 地幔对流
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2015/8/27
美国南加利福尼亚大学的科学家发现，板块内地震或与地幔对流有关。该研究为困扰人们已久的板块内地震成因提供了一种较为合理的解释。相关论文发表在最新一期《自然》杂志上。
地震是地壳快速释放能量所造成的一种振动现象，多发生在地球板块边界或断裂带上。板块间的相互挤压碰撞所造成的板块边沿及板块内部的错动和破裂，一直被认为是引发地震的主要原因。但美国西部等一些远离板块边界的地区也经常会出现地震，这一点让科学家...
Computer Models Show Significant Tsunami Strength for Ventura and Oxnard（图）
Computer Models Tsunami Strength Ventura Oxnard
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2015/9/9
Few can forget the photos and videos of apocalyptic destruction a tsunami caused in 2011 in Sendai, Japan. Could Ventura and Oxnard in California be vulnerable to the effects...
The Himalayas: These forbidding peaks in South Asia, which reach more than 29,000 feet and include Mount Everest, mark one of Earth's youngest mountain ranges. They also signal the location of an acti...
保护地球的磁场已有42亿岁（图）
保护地球 磁场 42亿岁
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2015/8/3
美国科学家日前指出，地球保护自己免受太阳辐射危害的“盾牌”——磁场目前已42亿岁高龄，这个隐形的保护壳或在地球形成后不久就已存在。这一新发现或可揭示为何地球适合人类居住，而火星却不适宜。
Scripps Researchers Map Out Trajectory of April 2015 Earthquake in Nepal
Scripps Researchers Map Out Trajectory April 2015 Earthquake Nepal
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2015/8/4
Researchers from Scripps Institution of Oceanography at UC San Diego have accurately mapped out the movement of the devastating 7.8-magnitude Nepal earthquake that killed over 9,000 and injured over 2...
Surprisingly high geothermal heating revealed beneath West Antarctic Ice Sheet
high geothermal heating West Antarctic Ice Sheet
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2015/7/13
The amount of heat flowing toward the base of the West Antarctic ice sheet from geothermal sources deep within the Earth is surprisingly high, according to a new study led by researchers at the Univer...
Study finds surprisingly high geothermal heating beneath West Antarctic Ice Sheet
high geothermal heating beneath West Antarctic Ice Sheet
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2015/8/4
The amount of heat flowing toward the base of the West Antarctic ice sheet from geothermal sources deep within the Earth is surprisingly high, according to a new study led by UC Santa Cruz researchers...
Old rocks hold on to their secrets. Now, a geophysicist at Michigan Technological University has unlocked clues trapped in the magnetic signatures of mineral grains in those rocks.. These clues will h...
OU Geologist Collaborates on Study to Determine Mechanism Associated with Fault Weakening in Earthquakes
OU Geologist Collaborates on Study Mechanism Associated Fault Weakening Earthquakes
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2015/5/25
A University of Oklahoma structural geologist and collaborators are studying earthquake instability and the mechanisms associated with fault weakening during slip. The mechanism of this weakening is c...
Study Proposes Common Mechanism for Shallow and Deep Earthquakes
Common Mechanism Shallow and Deep Earthquakes
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2015/5/25
Earthquakes are labeled “shallow” if they occur at less than 50 kilometers depth. They are labeled “deep” if they occur at 300-700 kilometers depth. When slippage occurs during these earth...
New study shows Antarctic ice shelf is thinning from above and below（图）
Antarctic ice shelf above below
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2015/5/25
The Larsen C Ice Shelf—whose neighbours Larsen A and B, collapsed in 1995 and 2002—is thinning from both its surface and beneath, according to an international study published in the journal The ...
In 2012, six Italian seismologists were sent to prison because they failed to predict the 2009 L'Aquila 6.3 magnitude earthquake.To some that may seem absurd but it points to the faith so many have co...
美国建立人工地震初步风险模型
美国 人工地震 初步风险模型
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2015/4/28
据每日科学网站报道，美国地质调查局近日发布报告，公开了一组人工地震初步风险模型所预测的地震频发区的地面晃动情况。利用该模型可以估算出下一年人工地震活动频率以及地面晃动的严重程度。人工地震，是指由人为活动引起的地震，如工业爆破、地下核爆等造成的震动。这份报告集中关注了美国的中部和东部地区，未来还会将美国西部各州的数据纳入研究范围。2009年以来，美国中东部地区的人工地震活动增加明显。美国地质调查局所...
Earth's surprise inside: Geologists unlock mysteries of the planet's inner core
Earth's surprise inside Geologists unlock mysteries planet's inner core
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2015/3/4
Seismic waves are helping scientists to plumb the world’s deepest mystery: the planet’s inner core.Thanks to a novel application of earthquake-reading technology, a research team at the University of ...
North American Plate Shattered Speed Records -- a Billion Years Ago
North American Plate Shattered Speed Records
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2015/3/4
North America traveled in fast company back in its youth.A new study led by Michigan Technological University geophysicist Aleksey Smirnov reveals that 1.1 billion years ago, the North American tecton...