Feed aggregator

Moment tensor inversion and uncertainty analysis of earthquakes in Garhwal-Kumaon Himalayas

Geophysical Journal International - Tue, 07/21/2026 - 00:00
SummaryThis study presents the moment tensor catalog of 40 small-to-moderate earthquakes (MW ≥3.5) in the Garhwal-Kumaon region of the northwestern Himalayas. We use the cut-and-paste approach to estimate the moment tensor and to quantify uncertainty in solutions. Observed data from local and regional broadband networks are used to see the impact of station distribution on moment tensor solutions. A 1-dimensional local velocity model is used to compute Green’s functions for generating the synthetic waveforms. The analysis reveals that combining local and regional networks significantly reduces the moment tensor uncertainties, with the local data set generally yielding a more stable solution than the regional one. Additionally, incorporating the first-motion polarity information along with waveform data provides robust solutions. Our moment tensor catalog has 21 earthquakes with thrust mechanisms, 4 with normal mechanisms, and 15 with oblique mechanisms. The systematically observed negative time shifts across most stations suggest that the actual velocity model is faster than the one assumed. This is most likely due to the unaccounted heterogeneous structure and inaccuracy in the 1D velocity model. The findings of this study will be beneficial in the advancement of 3D seismic imaging of the Himalayas and offer significant insights into the seismotectonics of the Garhwal-Kumaon Himalayas.

Making Weather and Climate Information Reach the Communities that Need It

EOS - Mon, 07/20/2026 - 19:29
Editors’ Highlights are summaries of recent papers by AGU’s journal editors. Source: Community Science 

Information about the weather is crucial for life, property, and work. Many people take it for granted. Yet, despite the centuries of sharing such information, especially when it is critical to provide warning, it does not reach all communities. There are many communities for which barriers of language, access, and trust lead to underutilization of information.

Sharma et al. [2026] address this challenge by considering how to design the information sharing process so it can get to the hard-to-reach communities. The study identifies where the information gets lost in translation. Considering this, the authors propose practical approaches to help ensure that all people, regardless of their location, language, or connectivity, can receive the information they need to prepare for and respond to high-impact weather events. This includes providing specific resources and staff that are dedicated to sharing this information with these communities. The study emphasizes the importance of designing information sharing processes that don’t assume that people will find the information—especially the most vulnerable.  

Citation: Sharma, S., Were, V., Farris, A., Joshi, A., Gerst, M. D., Sund, I., & Kenney, M. A. (2026). Information supply chain gaps for hard-to-reach communities: A solution-oriented framework from weather service insights. Community Science, 5, e2025CSJ000160. https://doi.org/10.1029/2025CSJ000160

—Muki Haklay, Editor, Community Science Exchange

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.

A Regionally Adaptive InSAR Atmospheric Delay Correction Method Integrating GNSS ZTD Observations and K-means Clustering

Publication date: Available online 20 July 2026

Source: Advances in Space Research

Author(s): Xitong Zhang, Peng Chen, Hang Liu, Zheng Li, Yibin Yao, Zufeng Li

An integrated FFCM-iTransformer model for GNSS height time series prediction

Publication date: Available online 19 July 2026

Source: Advances in Space Research

Author(s): Tianman Feng, Hanlin Liu, Qiang Zhang, Min dong

“First insights into the performance of the SWOT Level 2 River Single-Pass Vector Data Product in rivers with complex morphology: application to the Biobío River basin, Chile”

Publication date: Available online 16 July 2026

Source: Advances in Space Research

Author(s): Cristóbal Caro-Ramírez, Rodrigo Abarca-Del-Río, Mauricio Sepúlveda, Fernando Campos, Alfredo Ribeiro Neto, Jonas Felipe Santos de Souza, Jean François Cretaux, Daniel Moreira

Spaceborne lidar for forest aboveground biomass estimation: a systematic review of methodological trends

Publication date: 1 August 2026

Source: Advances in Space Research, Volume 78, Issue 3

Author(s): Janaki Sandamali, Lana L. Narine

Assessing the impact of climate change on water security using a system dynamics approach in the eastern part of the Caspian Sea basin

Publication date: 1 August 2026

Source: Advances in Space Research, Volume 78, Issue 3

Author(s): Faeze Jafari, Hamidreza Moradi, Ali Bagheri

A comprehensive assessment of different approaches for medium spatial resolution land surface phenology using in situ leaf observations across Mediterranean and Atlantic broadleaf ecosystems

Publication date: 1 August 2026

Source: Advances in Space Research, Volume 78, Issue 3

Author(s): Jose A. Caparros-Santiago, Victor Rodriguez-Galiano

Water in planetary interiors and regoliths: Distribution, origin, and geochemical implications

Publication date: 1 August 2026

Source: Advances in Space Research, Volume 78, Issue 3

Author(s): Jin-Yong Lee, Maimoona Raza, Jihye Cha

Validation and calibration of COSMIC-2 derived precipitable water vapor utilizing radiosonde observations across Iran

Publication date: 1 August 2026

Source: Advances in Space Research, Volume 78, Issue 3

Author(s): Ali Sam-Khaniani, Abdolreza Safari, Mahla Hedayati, Mohammad-Reza Hossien-Zadeh

Extraction of common mode errors from GNSS coordinate time series based on the integration of MSSA and PCA

Publication date: 1 August 2026

Source: Advances in Space Research, Volume 78, Issue 3

Author(s): Shengjun Liu, Jinyun Guo, Fushuai Zheng, Shuli Song, Xin Liu

Performance assessment of multiple LRI1B products for GRACE-FO time-variable gravity field recovery

Publication date: 1 August 2026

Source: Advances in Space Research, Volume 78, Issue 3

Author(s): Jiahui Zhang, Rui Tu, Wei You, Pengfei Zhang

Pan-African polyphase tectonics of the Bou Azzer–El Graara Inlier (Morocco): insights from remote sensing and structural mapping

Publication date: 1 August 2026

Source: Advances in Space Research, Volume 78, Issue 3

Author(s): Mohamed Ben massoude, Amina Wafik, Hassan Admou, Marouane chniouar, Youssef Atif, Amin Beiranvand Pour

YOLO-MACNet: A lightweight SAR ship detection model based on YOLO11

Publication date: 1 August 2026

Source: Advances in Space Research, Volume 78, Issue 3

Author(s): Wei Liu, Jiaqi Wang, Yi Cheng, Guowei Xu

Landslide susceptibility assessment based on a frequency ratio-ensemble learning framework and InSAR constraints

Publication date: 1 August 2026

Source: Advances in Space Research, Volume 78, Issue 3

Author(s): Feilong Zhao, Bo Hu, Hongjiang Wu, Wen Li, Chenglong Zhang, Long Hei, Li Wang, Wenqing Wu, Li Yang

Evaluating atmospheric and sun‑glint corrections for Sentinel‑2 total suspended matter mapping in the Northern Waters of Aceh

Publication date: 1 August 2026

Source: Advances in Space Research, Volume 78, Issue 3

Author(s): Yudi Haditiar, Muhammad Ikhwan, Haekal Azief Haridhi, Muhammad Nanda, Syahrul Purnawan, Maria Ulfah

A weight-constrained approximation of BIE estimation for reliable and efficient GNSS ambiguity resolution

Publication date: 1 August 2026

Source: Advances in Space Research, Volume 78, Issue 3

Author(s): Xianlu Tao, Ying Liu, Wanke Liu, Xiaohong Zhang, Shuguo Pan, Wang Gao

An investigation of periodic variations in GNSS satellite clocks from 2020 to 2024

Publication date: 1 August 2026

Source: Advances in Space Research, Volume 78, Issue 3

Author(s): Wei Ban, Jiayue Guo, Feiyu Mao, Xiaopeng Gong, Yidong Lou, Xiaoping Pang

xLSTM for multi-source cotton yield estimation and temporal interpretability across agro-ecological regions in Türkiye

Publication date: 1 August 2026

Source: Advances in Space Research, Volume 78, Issue 3

Author(s): Furkan Yardımcı, Mustafa Serkan Isik, Alp Ertürk, Esra Erten

A meteorological drought index accounting for the lagged response between precipitable water vapor and precipitation

Publication date: 1 August 2026

Source: Advances in Space Research, Volume 78, Issue 3

Author(s): Mingqing Mao, Tieding Lu, Xiwen Sun, Huajiang Xiong

Theme by Danetsoft and Danang Probo Sayekti inspired by Maksimer