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Geologists may have solved mystery of Green River's 'uphill' route

Phys.org: Earth science - Mon, 02/02/2026 - 13:00
New research may have solved an American mystery which has baffled geologists for a century and a half: How did a river carve a path through a mountain in one of the country's most iconic landscapes? Scientists have long sought an answer to this question of how the Green River, the largest tributary of the Colorado River, managed to create a 700-meter-deep canyon through Utah's 4km-high Uinta Mountains instead of simply flowing around them. The question is particularly confounding because, while the Uinta Mountains are 50 million years old, the Green River has been following this route for less than 8 million years.

North Sea sandstone could be used to store carbon dioxide, report suggests

Phys.org: Earth science - Mon, 02/02/2026 - 12:20
Sandstone beneath the North Sea could be used to store carbon dioxide, a study has claimed. The British Geological Survey (BGS) report shows how sandstone beneath the North Sea could assist with the U.K.'s plans for carbon capture and storage (CCS).

Japan says rare earth found in sediment retrieved on deep-sea mission

Phys.org: Earth science - Mon, 02/02/2026 - 09:40
Sediment containing rare earth was retrieved from ocean depths of 6,000 meters (about 20,000 feet) on a Japanese test mission, the government said Monday, as it seeks to curb dependence on China for the valuable minerals.

The 28 January 2026 landslide at the Rubaya coltan mine complex in the Democratic Republic of Congo

EOS - Mon, 02/02/2026 - 07:35

The Landslide Blog is written by Dave Petley, who is widely recognized as a world leader in the study and management of landslides.

Whilst I was skiing in the French Alps last week, there were a couple of significant landslides. The highest profile event was the vast and intriguing landslide at Niscemi in Sicily (located at [37.14176, 14.38524]), which is a failure on a very large scale. The rear scarp is about 1.2 km long, for example.

In terms of loss of life, the more consequential event occurred at the Rubaya coltan mine complex in the Democratic Republic of Congo on 28 January 2026 (approximate location is [-1.55938, 28.88349]). Reuters has a good report about this event – obtaining good information is very challenging as the area is not controlled by the government. The mining news site Discovery Alert reports that at least 227 people were killed and 20 were injured, but further people were thought to be buried in the debris. It is likely that the final death toll will not be determined.

This is the second massive landslide at the Rubaya complex in less than a year – a landslide on 19 June 2025 is thought to have killed over 300 people.

Al Jazeera has a report from May 2025 that describes the desperate conditions under which the artisanal miners at Rubaya work.

APT has a video on Youtube that apparently shows the aftermath of the landslide at Rubaya:-

This is a still from that video:-

The aftermath of the 28 January 2026 landslide at the Rubaya mining complex in the DRC. Still from a video posted to Youtube by APT.

Assuming that the landslide is the large area on the centre right of the image, it is easy to see how mining on the lower slope can trigger instability. Note also the area on the left of the image, where there is a large tension crack across the slope.

As yet, satellite imagery of the Rubaya area is not available since the landslide, so it is not yet possible to identify the exact location of the failure. I will keep an eye on this over the coming days.

Return to The Landslide Blog homepage Text © 2026. The authors. CC BY-NC-ND 3.0
Except where otherwise noted, images are subject to copyright. Any reuse without express permission from the copyright owner is prohibited.

Satellite study reveals 24.2 billion ton annual groundwater loss in High Mountain Asia

Phys.org: Earth science - Sun, 02/01/2026 - 22:30
A recent satellite-based study has uncovered alarming declines in groundwater storage across High Mountain Asia (HMA), widely known as the "Asian Water Tower." This critical water source, which sustains agricultural irrigation, urban water supplies and ecological security for hundreds of millions of people in more than a dozen downstream countries, is depleting at a staggering rate of approximately 24.2 billion tons per year.

An aluminum production chain for the Moon: Experimental demonstration of aluminum metal extraction for in-situ resource utilization

Publication date: 1 February 2026

Source: Advances in Space Research, Volume 77, Issue 3

Author(s): Xavier Walls, Alex Ellery, Katherine Marczenko, Priti Wanjara

Adaptive gaining-sharing knowledge region coverage planning for multi-stratospheric airships in complex environments

Publication date: 1 February 2026

Source: Advances in Space Research, Volume 77, Issue 3

Author(s): Xing-han Liu, Ming Zhu, Yi-fei Zhang, Tian Chen

Adaptive neural networks-based fixed-time fault-tolerant control for space manipulator with prescribed performance and input saturations

Publication date: 1 February 2026

Source: Advances in Space Research, Volume 77, Issue 3

Author(s): Sheng Gao, Wei Zhang, Ting Li, Zhaoguang Wang

Tropical weather cycles linked to faster Arctic ice loss in autumn

Phys.org: Earth science - Sun, 02/01/2026 - 16:40
When it comes to global warming and climate change, we often hear news stories about tipping points where Earth's systems shift into a new and dangerous state. One such may have been reached in the year 2000 that caused tropical weather cycles to have a greater effect on autumn sea ice melt across the Laptev and East Siberian seas, according to a study published in Science Advances.

How to cut harmful emissions from ditches and canals

Phys.org: Earth science - Sun, 02/01/2026 - 15:50
Ditches and canals are the underdog of the freshwater world. These human-made waterways are often forgotten, devalued, and perceived negatively—think "dull as ditchwater." But these unsung heroes have a hidden potential for climate change mitigation, if they're managed correctly.

Partial Shutdown Over DHS Funding Ensnares Education, Health

EOS - Sat, 01/31/2026 - 05:01
body {background-color: #D2D1D5;} Research & Developments is a blog for brief updates that provide context for the flurry of news regarding law and policy changes that impact science and scientists today.

The U.S. government entered a partial shutdown Saturday at 12:01 Eastern time after Congress failed to resolve a showdown over funding for the Department of Homeland Security (DHS) and restrictions on Immigration and Customs Enforcement (ICE). The DHS appropriation was tied into a six-bill package that also included funding for the Departments of Defense, Education, Health and Human Services (HHS), Housing and Urban Development, Labor, State, Transportation, and Treasury.

Senate leaders and the White House struck a deal late Thursday evening to split the DHS spending bill away from the other five bipartisan appropriations bills. Friday evening, the Senate passed the amended appropriations package ahead of the shutdown deadline; it will continue to negotiate the DHS bill for 2 weeks.

However, any changes to the spending bills, including splitting them apart, also need to be passed by the House of Representatives, which is on recess until Monday 2 February. Until the House votes on the five-bill package, the agencies included in that package will remain shut down, as will DHS. (ICE will continue to operate during the shutdown due to money allocated in the One Big Beautiful Bill Act of 2025.)

“We may inevitably be in a short shutdown situation…but the House is going to do its job,” House Speaker Mike Johnson (R-La.) told reporters Thursday evening, suggesting that the House will act quickly to pass the amended five-bill package and avoid significant financial impacts.

What’s Shut Down for Science?

DHS runs the Federal Emergency Management Agency (FEMA), which is currently helping coordinate state-level responses to the massive winter storm that impacted millions of people across southern and eastern U.S. states over the past week. The DHS spending bill, which includes FEMA funding, has not been agreed upon or passed. Experts have said that FEMA would have enough money in its Disaster Relief Fund to continue to respond to storm-related impacts during a partial shutdown, at least for a few weeks.

During the most recent shutdown, which lasted 43 days this past fall, the Department of Education furloughed 87% of its employees. Under its shutdown contingency plan, the department states that it will continue to disburse Pell Grants and Federal Direct Student loans, and borrowers will still be required to make payments. States, schools, and other grantees will be able to access funds. However, no new grants will be issued, and its barebones Office of Civil Rights will pause reviews and investigations.

 
Related

During the fall 2025 shutdown, HHS furloughed 41% of its employees. According to its contingency plan, the department will maintain the minimal level of readiness for all health hazards, including pandemics and extreme weather response. Drug and medical device reviews will continue, as will disease outbreak monitoring and support to Medicare, Medicaid, and other healthcare programs. Data collection, validation, and analysis, grant oversight, and some CDC communications will cease.

Democrats are pushing for increased oversight and restrictions on ICE’s activities throughout the country after federal agents killed two people, Renee Macklin Good and Alex Pretti, in Minneapolis in January and engaged in other actions toward immigrants that have sparked national outrage. Democrats’ immigration demands have not been agreed to by Republicans or the White House.

Appropriations bills funding other science-related agencies, including the Environmental Protection Agency, National Science Foundation, NASA, NOAA, and the U.S. Geological Survey, have already become law. These agencies will continue to run during the current partial government shutdown.

—Kimberly M. S. Cartier (@astrokimcartier.bsky.social), Staff Writer

These updates are made possible through information from the scientific community. Do you have a story about how changes in law or policy are affecting scientists or research? Send us a tip at eos@agu.org. Text © 2026. AGU. CC BY-NC-ND 3.0
Except where otherwise noted, images are subject to copyright. Any reuse without express permission from the copyright owner is prohibited.

On Receiver Functions with Sediment Reverberations

Geophysical Journal International - Sat, 01/31/2026 - 00:00
SummaryTeleseismic P-wave receiver function (RF) analysis is a powerful tool for probing deep structures; however, its application to regions with sedimentary cover remains challenging. The interference by converted and reflected waves related to the sediments can form strong reverberations and render individual phases unidentifiable, complicating the investigation of sedimentary structures. Moreover, the strong, long-lasting sediment-induced waves can mask seismic phases from deeper layers, making it difficult to investigate the underlying layers. We investigated all the phases in RFs and establish simple relationships between the underlying layer structure and the phases and phase groups. By measuring the times of all phases and phase groups or stacking the amplitudes of all phases, we can investigate the structure more reliably; however, when interference is so strong that the peaks and troughs do not align with individual phases, the models resulting from using these phases may contain significant uncertainty. In these cases, simple RF waveform fitting constrained by the one-way vertical travel time (the product of wave vertical slowness and layer thickness) or the period of the phase groups associated with the sedimentary layer can resolve the sedimentary structure reliably. Deconvolving the P-wave RFs predicted by the resulting sedimentary model from the original RF can remove the sedimentary waveforms effectively and correct the sediment-induced delays in deeper-layer phases. We demonstrate the effectiveness of our proposed approaches for inverting the structure and removing the sedimentary response using both synthetic and real data.

Editorial Board

Publication date: January 2026

Source: Journal of Atmospheric and Solar-Terrestrial Physics, Volume 278

Author(s):

From drought to deluge: Understanding the atmospheric and climatic forces behind the United Arab Emirates' recent flood event

Publication date: January 2026

Source: Journal of Atmospheric and Solar-Terrestrial Physics, Volume 278

Author(s): Farahnaz Fazel-Rastgar, Masoud Rostami, Venkataraman Sivakumar, Bijan Fallah

Physicochemical analysis and source apportionment of PM<sub>1.0</sub> and PM<sub>2.5</sub> in Harbin

Publication date: January 2026

Source: Journal of Atmospheric and Solar-Terrestrial Physics, Volume 278

Author(s): Likun Huang, Zhouyu Guo, Yan Wang, Guangzhi Wang, Dongdong Wang, Jingyi Zhang, Xinyu Feng

Enhanced ground-based GNSS tomography for accurate water vapor retrieval

Publication date: January 2026

Source: Journal of Atmospheric and Solar-Terrestrial Physics, Volume 278

Author(s): Xia Pengfei, Zhang Weikang, Shu Liang, Guo Min

Corrigendum to “Three-dimensional lightning channel structure reconstruction: An efficient matching TOA algorithm for VHF pulses” [J. Atmos. Sol. Terr. Phys. 278 (2026) 106702]

Publication date: January 2026

Source: Journal of Atmospheric and Solar-Terrestrial Physics, Volume 278

Author(s): Yueyang Wang, Yun Li, Shi Qiu, Shuangjiang Du, Zheng Sun, Lihua Shi

Optimized fuzzy logic algorithm for classifying meteorological and non-meteorological echoes in CINRAD/SA data in Poyang Lake region

Publication date: January 2026

Source: Journal of Atmospheric and Solar-Terrestrial Physics, Volume 278

Author(s): Landi Zhong, Haibo Zou, Xiaoyou Long, Jiaxin Wang, Yige Huang

Sequence of space storm effects in ionospheric anomalies and geomagnetic activity

Publication date: January 2026

Source: Journal of Atmospheric and Solar-Terrestrial Physics, Volume 278

Author(s): T.L. Gulyaeva

Assessment of a simple wave-amplitude approximation for tsunami-generated gravity waves at all levels of viscosity in the thermosphere

Publication date: January 2026

Source: Journal of Atmospheric and Solar-Terrestrial Physics, Volume 278

Author(s): Dave Broutman, Harold K. Knight, James W. Rottman, Stephen D. Eckermann

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