搜索结果: 31-45 共查到“国际动态 固体地球物理学”相关记录371条 . 查询时间(2.086 秒)
2020年6月12日，《科学》（Science）杂志刊发文章《序列地震图：核幔边界区域散射的全景图》称，马里兰大学研究人员使用了一种称为序列器（Sequencer）的机器学习算法，分析了数千地震波沿着核幔边界的地震回波（echoes）特征，获得了整个太平洋区域地震波回波的全景视图，并且发现地球核幔边界存在比以前已知更广泛的异质结构，即存在异常密集的热岩区域。这些成果对于未来地球深部探测、板块构造运...
Geochemists solve mystery of Earth's vanishing crust（图）
Geochemists solve mystery Earth vanishing crust
2020/7/10
Earth's crust is the solid, outermost layer of our planet. Much of what happens below that layer remains a mystery, including the fate of sections of crust that vanish back into the Earth.Now, a team ...
Taking a landslide's temperature to avert catastrophe（图）
Taking landslide temperature avert catastrophe
2020/7/3
Engineers at Duke University have developed a comprehensive new model of deep-seated landslides, and demonstrated that it can accurately recreate the dynamics of historic and current landsli...
Scientists find much earlier birth date for Earth's tectonic plates（图）
Scientists earlier birth date Earth tectonic plates
2020/6/5
Geophysicists funded by the National Science Foundation have reported that Earth's ever-shifting, underground network of tectonic plates was firmly in place more than 4 billion years ago -- at least a...
A steaming cauldron followed the dinosaurs' demise（图）
steaming cauldron followed dinosaurs' demise
2020/6/5
A new study reveals that the Chicxulub impact crater may have harbored a vast and long-lived hydrothermal system following the catastrophic impact event linked to the extinction of the dinosaurs 66 mi...
2020年4月24日，加拿大麦吉尔大学领导的一项新研究发现，地下的构造板块显示出不同程度的粗糙度，这有助于解释为什么某些地震比其他地震更强烈。相关研究成果近期发表于《自然-地球科学》（Nature Geoscience）。
Tectonic plates started shifting earlier than previously thought（图）
Tectonic plates started shifting previously thought
2020/5/9
An enduring question in geology is when Earth's tectonic plates began pushing and pulling in a process that helped the planet evolve and shaped its continents into those that exist today. Some researc...
2018年12月22日晚9:30-10:00，海啸袭击了印尼苏达海峡沿岸城市，致使437人死亡，几千人受灾。当地民众没有感觉到明显地震动，印尼地震台网中心(BMKG)仅定位到一个3级左右的小地震，因而未提前发布有效的海啸预警。中山大学叶玲玲教授等（Ye et al.，2020）利用印尼的宽频带地震波数据，发现此次海啸由滑坡引发，与2018年活跃的Anak Krakatau火山活动有关，相关成果发表...
NG：火星地震活动性（图）
NG 火星 地震活动性
2020/4/29
2018年11月26日，美国洞察号（Insight）火星探测器登陆火星赤道附近的埃律西昂平原（Elysium Planitia）。2019年2月底，火星地震仪（简称火震仪）布设完成，其研究任务包括探测火星内部的地震活动性、约束火星内部结构、物质成分及动力学过程。近期，Giardini et al.（2020）在Nature上发表了《The seismicity of Mars》一文，首次提供火星地...
柯伊伯带小行星被认为是原地形成的星子，在后期巨行星轨道迁移事件中未受到严重扰动，因此它们记录了星云形成星子的详细过程，是揭示太阳系起源和早期演化这一基本科学问题的“钥匙”(Nesvorny, 2018)。2006年发射的 “新视野号”（New Horizons）于2019年1月飞至柯伊伯带，对编号为486958的小行星（Ultima Thule, 2014 MU69）开展了近距离探测，首次获得了柯...
火星探测器在火星表面观测到了大量河流、湖泊和海洋留下的地质痕迹（图1）。这说明曾经的火星和地球一样，有大量的地表水和温湿的气候（Carr et al, 1987; Lasue et al., 2013）。但现在的火星气候寒冷干燥，失去了所有的地表液态水，只有两极干冰极盖区存在少部分冰和大气中存在少量水蒸气。火星曾经的湖泊海洋为什么会消失，那么多地表水去了哪里，地球会不会有一天也像火星一样失去所有的...
By incorporating the architecture of city drainage systems and readings from flood gauges into a comprehensive statistical framework, researchers at Texas A&M University can now accurately p...
Scientists determine early Earth was a ‘water world’ by studying exposed ocean crust（图）
Scientists early Earth water world’ exposed ocean crust
2020/3/13
The Earth of 3.2 billion years ago was a "water world" of submerged continents, geologists say, after analyzing oxygen isotope data from ancient ocean crust now exposed on land in Australia. The findi...
Turbulence is everywhere -- it rattles our airplanes and makes tiny whirlpools in our bathtubs -- but it's one of the least understood phenomena in physics.Turbulence occurs when an ordered fluid flow...
