地球物理学

 

学术动态
A Rocky Fate for   Greenhouse Gases
Scientists at the University of Tsukuba used a sophisticated set   of experimental tests, including synchrotron X-ray scattering and quantum   computer modeling, to study the effect of temperature on the ...
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Strong Winds   Power Electric Fields in the Upper Atmosphere
What happens on Earth doesn't stay on Earth. advertisement Using   observations from NASA's ICON mission, scientists presented the first direct   measurements of Earth's long-theorized dynamo on the edge ...
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2021年11月30日西藏那曲市双湖县5.8级地震   科技支撑简报
据中国地震台网正式测定,2021年11月30日21时53分在西藏那曲市双湖县发生5.8级地震,震源深度10千米,震中位于北纬31.76度,东经87.94度。中国地震局地球物理研究所按照应急预案有序启动科技支撑,产出了地震动强度预...
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RS:InSAR观测约束的2021年中国漾濞浅源地震源模型及强地面运动模拟
2021年5月21日在云南省漾濞县发生了Mw6.1地震,此次地震引起了不可忽视的地震灾害。为了更好地了解此次地震的地表形变模式、震源特征、对邻近断层的影响以及强地面运动。我们利用升、降轨Sentinel-1卫星的SAR数据,经...
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地质地球所研究建立火星全球磁场模型
火星是地球的近邻。通常认为,火星在大约40亿年以前具有类似地球的全球偶极磁场,并存在宜居的生命环境。但由于某种原因在大约40亿年前,火星内部磁场发电机停止、全球磁场消失,导致外部太阳风直接与火星大气发...
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De nouvelles   preuves pour identifier les insaisissables séismes supershear
Les séismes dit « supershear » sont les types de séismes les   plus rares. Ils se produisent lorsque la vitesse du séisme (4 à 5 km/s)   dépasse la vitesse des ondes de cisaillement (3,5 km/s) dans...
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Bacteria May Be   Key to Sustainably Extracting Earth Elements for Tech
Rare earth elements from ore are vital for modern life but   refining them after mining is costly, harms the environment and mostly occurs   abroad. advertisement A new study describes a proof of principl...
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GJI:面向地震流动重力测量的贝叶斯平差新方法与模型测试
陆地高精度重复重力观测可以获得近地壳内部场源的微伽级时变重力信号,是研究地壳内部孕震区介质变化的重要依据。现有的中国大陆重力观测网包含101个绝对重力基点和超过3000个相对重力联测点,绝对重力测量采用FG5/A...
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Earthquakes and   Extreme Rainfall Lead to a Significant Increase in the Rates of Landslides in   Nepal
Earthquakes and extreme rainfall can lead to a six-fold increase   in the rates of rainfall-triggered landslides occurring during Nepal’s   monsoon season, according to new research. advertisement The Hi...
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Fate of Sinking   Tectonic Plates Is Revealed
Our world's surface is a jumble of jostling tectonic plates,   with new ones emerging as others are pulled under. The ongoing cycle keeps   our continents in motion and drives life on Earth. But what happ...
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Seismic Shockwave   Pattern May Be Redirecting Earthquake Damage
New research from The University of Texas at Austin could change   the way scientists think about potential damage from earthquakes.   advertisement The study examined data from one of the densest seismic...
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Tectonics:四川盆地及青藏高原东缘远震体波层析成像研究
四川盆地位于青藏高原东缘,新生代以来其周缘经历了不同程度的隆升与构造变形。深部结构是认识地表构造变形的关键因素之一。本研究共计使用516个固定及流动台站,包括最新布设在四川盆地内部的25个流动台。这些高密度...
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地球物理学报:基于深度学习到时拾取自动构建长宁地震前震目录
实现地震观测数据的自动化和智能化处理,是地震科技创新工程的重要组成部分。最近三四年,以卷积神经网络(CNN)为代表的深度学习技术已经被应用于地震分类、震相识别等,并在实际连续波形数据,尤其是微小地震检测上...
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Coal Creation   Mechanism Uncovered
The mechanism behind one of the first stages of coal creation   may not be what we thought it was, according to a team of researchers who   found that microbes were responsible for coal formation and prod...
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Increasingly   Frequent Wildfires Linked to Human-Caused Climate Change
Research by scientists from UCLA and Lawrence Livermore National   Laboratory strengthens the case that climate change has been the main cause   of the growing amount of land in the western U.S. that has ...
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FES:华北中部造山带及其邻区地壳各向异性研究
华北克拉通是世界上最古老的克拉通之一,它由西部块体和东部块体沿华北中部造山带拼合而成。自新生代以来,华北中部造山带经历了强烈的构造变形和岩浆活动。   在本研究中,我们利用ChinArray台阵三期309个台站记录的波...
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Why Did Glacial   Cycles Intensify a Million Years Ago?
Something big happened to the planet about a million years ago.   There was a major shift in the response of Earth's climate system to   variations in our orbit around the Sun. The shift is called the Mid...
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Lake’s   Radioactivity Concentration Predicted for 10,000 Days After the Fukushima   Accident
In March 2011, the Fukushima Daiichi Nuclear Power Plant was   damaged by a powerful earthquake and tsunami, causing nearby lakes to be   contaminated with radioactive cesium-137. Although the contaminati...
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Let’s Talk About   the 1,800-Plus 'Young' Volcanoes in the US Southwest
They're born. They live once, erupting for a period that might   last for days, years or decades. Then, they go dark and die. advertisement   This narrative describes the life of a monogenetic volcano, a ...
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Better Models of   Atmospheric ‘detergent’ Can Help Predict Climate Change
Earth's atmosphere has a unique ability to cleanse itself by way   of invisible molecules in the air that act as minuscule cleanup crews. The   most important molecule in that crew is the hydroxyl radical...
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Clues from the   Ancient Past Can Help Predict Abrupt Climate Change
Climate 'tipping points' can be better understood and predicted   using climate change data taken from the ancient past, new research shows.   advertisement Current understanding of tipping points, in whi...
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A Life Less   Obvious: Study Sheds Light on the Evolution of Underground Microbes
Deep, dark fractures reaching far down into the oldest rocks on   Earth may seem about as hospitable to life as outer space, but some estimates   suggest that microbes dwelling deep in the Earth's crust a...
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The Silent   Build-Up to a Super-Eruption
It is estimated that about 5-10 volcanoes worldwide are capable   of producing a super-eruption that could catastrophically affect global   climate. One of these volcanoes hides below the waters of Lake T...
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Climate Change   Will Triple Impacts to World’s 'Life Zones' Unless Emission Rates Are   Dramatically Reduced
A new study from WCS and multiple partners that modeled changes   in the world’s 45 different “life zones” from climate change revealed that   climate impacts may soon triple over these areas if the ea...
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Uncovering the   Secrets Behind Earth’s First Major Mass Extinction
We all know that the dinosaurs died in a mass extinction. But   did you know that there were other mass extinctions? There are five most   significant mass extinctions, known as the “big five,” where at...
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地球物理学报:贝叶斯同化重力反演方法构建川滇地壳密度模型
重力异常对地壳横向密度变化敏感,而无约束重力反演得到的密度模型其垂向分辨能力往往不理想。为了改善反演结果的垂向分辨率,本文参考已有先验分层模型,基于数据同化和贝叶斯参数优化理论,提出了一种贝叶斯同化重...
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SRL:再现1850年西昌M7.5级地震高频地震动的空间分布特征
通过实际小地震评估未来破坏性大地震的强地震动,再现历史大地震的地震动强度的空间分布特征,具有非常重要的防震减灾价值。经验格林函数法是一种能够在合成地震动中传递实际地震信息的数值模拟方法。本文利用2018年...
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BSSA:应用中国钻孔数据建立的一个新的多参数VS30外推模型
VS30是地表以下30m的以时间平均的土层剪切波速值。在包括美国NEHRP建筑抗震设计条款以及欧洲标准委员会的建筑抗震设计规范等很多国家的抗震设计规范中,VS30是确定场地类别的主要参数。同时,因场地地震效应是地震风...
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国家重点研发计划项目《地震构造主动源监测技术系统研究》取得重要成果—小型化可移动式气枪震源激发技术系统
服务地震科学研究的科学装备研发是提升地震监测能力,提高防震减灾服务水平的重要内容。研究所长期以来开展了水库大容量气枪的波速变化监测研究,在全国建立了多个固定式的大容量气枪发射台。建立小型化的气枪震源激...
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A New Earth   Bombardment Model
A team led by Southwest Research Institute has updated its   asteroid bombardment model of the Earth with the latest geologic evidence of   ancient, large collisions. These models have been used to unders...
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Prédire la   génération de vagues de tsunamis causées par effondrement de terrain
En décembre 2018, pendant une période d’activité éruptive,   l'effondrement partiel du flanc de l'Anak Krakatau en Indonésie a provoqué un   tsunami qui a causé d'importants dégâts humains et ma...
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How to Better   Identify Dangerous Volcanoes
Volcanologists have long been troubled by two questions: When   exactly will a volcano erupt next? And how will that eruption unfold? Will   the lava flow down the mountain as a viscous paste, or will the...
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Quantum Phase   Transition Detected on a Global Scale Deep Inside the Earth
The interior of the Earth is a mystery, especially at greater   depths (> 660 km). Researchers only have seismic tomographic images of   this region and, to interpret them, they need to calculate seismic ...
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Challenging the   Big Bang Puzzle of Heavy Elements
It has long been theorized that hydrogen, helium, and lithium   were the only chemical elements in existence during the Big Bang when the   universe formed, and that supernova explosions, stars exploding ...
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Low-Cost,   Continuous Seismic Monitoring System to Support Emission Reduction Efforts
Kyushu University researchers demonstrated a new method for   continuously monitoring the environment just below Earth's surface using a   small seismic source and fiber-optic cables. advertisement Accura...
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EG:中国地震科学实验场及其邻区的基于设定地震及其物理过程的地震灾害评估
受印度板块北向挤压的影响,川滇地区一直以来都是地震活动性较强的区域。历史上曾多次发生破坏性大、破坏范围广的地震事件。随着近些年来经济的持续发展,小震级地震往往能够引起与相应震级本不相匹配的较大破坏...
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PAAG:天山地区地壳厚度与波速比研究
自新生代以来,印度板块与欧亚板块的碰撞挤压不仅造就了喜马拉雅山脉和青藏高原,还导致了远离大陆碰撞边界的天山造山带发生强烈变形和快速隆升,使其成为最年轻(7000米)。目前,这两大大陆板块的挤压作用仍在...
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Zeolites’   Isotopes Defy Nature
Zeolites could be considered as nature's workhorse.   advertisement Filled with microscopic holes and channels, these ultraporous   minerals can soak up environmental contaminants, filter drinking water, ...
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Earth’s ‘solid’   Inner Core May Contain Both Mushy and Hard Iron
3,200 miles beneath Earth's surface lies the inner core, a   ball-shaped mass of mostly iron that is responsible for Earth's magnetic   field. In the 1950's, researchers suggested the inner core was solid...
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Seismic Forensics   and Its Importance for Early Warning
The scientific description of the catastrophic rockslide of   February 7, 2021, in India's Dhauli Ganga Valley reads like a forensic   report. A rockslide and the subsequent flood had killed at least a hu...
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Geologically   Vibrant Continents Produce Higher Biodiversity
Tropical rainforests are the most biodiverse habitats on Earth.   They are home to a huge number of different plants, animals, fungi and other   organisms. These forests are primarily spread over three co...
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Additional Threat   to Antarctica’s Floating Ice Shelves
Glaciologists at the University of California, Irvine and NASA's   Jet Propulsion Laboratory have examined the dynamics underlying the calving   of the Delaware-sized iceberg A68 from Antarctica's Larsen ...
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Dinosaurs’ Ascent   Driven by Volcanoes Powering Climate Change
The rise of dinosaurs coincided with environmental changes   driven by major volcanic eruptions over 230 million years ago, a new study   reveals. advertisement The Late Triassic Carnian Pluvial Episode (...
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Structural   Characterization Offshore Newfoundland
Southwest Research Institute completed research characterizing   the complex geological evolution of the Orphan Basin, offshore Newfoundland   and Labrador, using an extensive database of newly available,...
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