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Nanopore sequencing set to transform our understanding of proteins | News

A new protein sequencing method, which uses a biological motor to pull a protein through a tiny nanopore, could revolutionise protein analysis. The researchers at the University...

Jupiter’s Great Red Spot is shrinking

Centuries ago, astronomers observed a dark oval — nicknamed the Permanent Spot — on Jupiter. It was located at the same latitude, or distance from Jupiter’s equator,...

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What’s making Earth’s atmosphere drier?

Over the past few decades, scientists have shown the atmosphere is losing moisture, causing soils to...

Just keep swimming | Science

A shark scientist charts her own course

断裂成熟度和断裂走向,哪个对大地震更重要?

Source: AGU Advances This is an authorized translation of an Eos article. 本文是Eos文章的授权翻译。 2021年5月22日凌晨,中国青藏高原地处偏远的玛多县发生了7.4级地震。这是自1997年以来所发生的九次7级以上的地震序列中最新一次,其地表破裂长度是全球同震级地震平均长度的两倍。地震发生在相对不成熟的左旋走滑断裂带-江错断裂的东端,该断裂滑动速率较低,大约每年1毫米,但在地震之前的活动断裂图上没有显示该断裂。 揭示致灾性大地震的地质和动力过程,有助于评估未来震源所在地乃至全世界的地震灾害。在一项新研究中,Liu-Zeng等人详细分析了玛多地震,探究断层结构与地震动力学之间的关系。 为此,研究人员将野外实地考察,震前和震后卫星影像,以及无人机拍摄的、覆盖整个地震破裂的厘米级分辨率影像相结合。高精度遥感技术使他们突破了受高海拔和恶劣自然环境而无法到达地震破裂带的限制。 研究组评估了地震断破裂带内及其断裂两侧的弥散变形。他们发现,破裂沿袭多个断裂段,其走向与区域应力场夹角不同,成熟度也各不相同。断裂的成熟度并不一定等同于其年龄;它表示断裂的发育程度,或者随着时间和断裂活动性的演化程度。 以往的研究强调了断裂成熟度在地震破裂动力学中的重要性。然而,在玛多地震中,研究人员发现,断层走向对地表变形的大小和弥散度的影响大于断裂成熟度。这些发现表明,在地震危险性评价方法中充分考虑断裂走向与区域应力场的匹配度参数,可能会提高评估水平。(AGU Advances, https://doi.org/10.1029/2023AV001134, 2024) —科学撰稿人Sarah Stanley This translation was made by Wiley. 本文翻译由Wiley提供。 Read this article...

Impossible aerogel that reflects more visible light than it receives prompts scepticism | Research

Researchers in China claim to have produced a photoluminescent aerogel with a visible light reflectance of 104%. When placed outside in the sun, they...

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