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SummaryOn 6 February 2023, an Mw 7.8 left-lateral strike-slip fault earthquake occurred on the East Anatolian Fault Zone (EAFZ) in Türkiye. This study examined the spatial variation of the stress field around Türkiye better to understand the generation process of this event. We first combined focal mechanisms around Türkiye, created a dataset consisting of 2984 focal mechanisms, and conducted stress tensor inversion. The results showed that the maximum compressional axis near the EAFZ was oriented north-south and slightly varied along the strike. Moreover, the relative magnitude of north-south compressional stress gradually increases from south to north, and the stress regime changes from a normal fault stress regime to a strike-slip fault regime. The stress change caused by the Mw 7.8 mainshock does not explain this lateral pattern, implying that this stress regime transition existed before the mainshock. This suggests that shear stress on the EAFZ was low in this southern segment because it was unfavourably oriented to the regional stress field. Previous studies have reported that the Mw 7.8 mainshock rupture started at a splay fault, first propagated through the central and northern segments and then backpropagated with a time delay toward the southern segment, where it caused a significant but relatively small slip. The preexisting along-strike shear stress variation on the fault may have contributed to the smaller and delayed coseismic slip in the southern segment than in the central and northern segments. Moreover, the mainshock rupture possibly caused stress rotation locally near the central segment where the magnitudes of the vertical and north-south compressional stresses were almost equal.

We assess the orbit accuracy and time synchronization error using the L1 and C1 observables during the different solar activities. In general, GPS single-frequency (SF) observable can be used for commercial ap...

Publication date: 15 August 2024

Source: Earth and Planetary Science Letters, Volume 640

Author(s):

Publication date: 15 August 2024

Source: Earth and Planetary Science Letters, Volume 640

Author(s): J.A. Parera-Portell, F.d.L. Mancilla, J. Morales, J. Díaz

Publication date: 15 August 2024

Source: Earth and Planetary Science Letters, Volume 640

Author(s): Lori N Willhite, Valerie A Finlayson, Richard J Walker

Publication date: 15 August 2024

Source: Earth and Planetary Science Letters, Volume 640

Author(s): Charles D. Beard, Adrian A. Finch, Anouk M. Borst, Kathryn M. Goodenough, William Hutchison, Ian L. Millar, Tom Andersen, Helen M. Williams, Owen M. Weller

Publication date: 15 August 2024

Source: Earth and Planetary Science Letters, Volume 640

Author(s): Peter Köhler, Luke C. Skinner, Florian Adolphi

Publication date: 15 August 2024

Source: Earth and Planetary Science Letters, Volume 640

Author(s): Jiangyang Zhang, Fan Zhang, Jian Lin, Xiang Gao, Chen Cai, Zhiyuan Zhou

Publication date: 15 August 2024

Source: Earth and Planetary Science Letters, Volume 640

Author(s): Subhajit Ghosh, Holger Stünitz, Hugues Raimbourg, Jacques Précigout, Ida Di Carlo, Renée Heilbronner, Laurette Piani

Publication date: 15 August 2024

Source: Earth and Planetary Science Letters, Volume 640

Author(s): Yujian Wang, Jingao Liu

Publication date: 15 August 2024

Source: Earth and Planetary Science Letters, Volume 640

Author(s): Birger Rasmussen, Jian-wei Zi, Andrey Bekker

Publication date: 15 August 2024

Source: Earth and Planetary Science Letters, Volume 640

Author(s): Samuel Angiboust, Paraskevi Io Ioannidi, Iskander Muldashev

Publication date: 15 August 2024

Source: Earth and Planetary Science Letters, Volume 640

Author(s): David Fastovich, Tripti Bhattacharya, Lina C. Pérez-Ángel, Natalie J. Burls, Ran Feng, Scott Knapp, Theodor Mayer

Publication date: 15 August 2024

Source: Earth and Planetary Science Letters, Volume 640

Author(s): Kosuke Heki

Publication date: 15 August 2024

Source: Earth and Planetary Science Letters, Volume 640

Author(s): Goru Takaichi, Yu Nishihara, Kyoko N. Matsukage, Masayuki Nishi, Yuji Higo, Yoshinori Tange, Noriyoshi Tsujino, Sho Kakizawa

Digitization and calibration of historical solar absorption infrared spectra from the Jungfraujoch site
Jamal Makkor, Mathias Palm, Matthias Buschmann, Emmanuel Mahieu, Martyn P. Chipperfield, and Justus Notholt
Atmos. Meas. Tech. Discuss., https://doi.org/10.5194/amt-2024-93,2024
Preprint under review for AMT (discussion: open, 0 comments)
During the years 1950 and 1951, Marcel Migeotte took regular solar measurements in form of paper rolls at the Jungfraujoch site. These historical spectra proved valuable for atmospheric research and needed to be saved for posterity. Therefore, a digitization method which used image processing techniques was developed to extract them from the historical paper rolls. This allowed them to be saved in a machine-readable format that is easily accessible to the scientific community.

Rapid quantitative analysis of SVOCs in indoor surface film using Direct Analysis in Real Time mass spectrometry: A case study on phthalates
Ying Zhou, Longkun He, Jiang Tan, Jiang Zhou, and Yingjun Liu
Atmos. Meas. Tech. Discuss., https://doi.org/10.5194/amt-2024-104,2024
Preprint under review for AMT (discussion: open, 0 comments)
This study presents a sensitive DART-MS/MS method for the fast and accurate quantification of SVOCs in organic films without the need for pre-treatment. This method developed herein offers substantially improved repeatability in the absence of internal standards. By utilizing MS/MS analysis, separation of isomeric components within films becomes possible. These developments increase the feasibility of the DART-MS approach for studying the dynamics of SVOCs in indoor surface film.

Regional seismic risk assessment based on ground conditions in Uzbekistan
Vakhitkhan Alikhanovich Ismailov, Sharofiddin Ismatullayevich Yodgorov, Akhror Sabriddinovich Khusomiddinov, Eldor Makhmadiyorovich Yadigarov, Bekzod Uktamovich Aktamov, and Shuhrat Bakhtiyorovich Avazov
Nat. Hazards Earth Syst. Sci., 24, 2133–2146, https://doi.org/10.5194/nhess-24-2133-2024, 2024
For the basis of seismic risk assessment, maps of seismic intensity increment and an improved map of seismic hazard have been developed, taking into account the engineering-geological conditions of the territory of Uzbekistan and the seismic characteristics of soils. For seismic risk map development, databases were created based on geographic information system platforms, allowing us to systematize and evaluate the regional distribution of information.

The risk of synoptic-scale Arctic cyclones to shipping
Alexander Frank Vessey, Kevin I. Hodges, Len C. Shaffrey, and Jonathan J. Day
Nat. Hazards Earth Syst. Sci., 24, 2115–2132, https://doi.org/10.5194/nhess-24-2115-2024, 2024
The risk posed to ships by Arctic cyclones has seldom been quantified due to the lack of publicly available historical Arctic ship track data. This study investigates historical Arctic ship tracks, cyclone tracks, and shipping incident reports to determine the number of shipping incidents caused by the passage of Arctic cyclones. Results suggest that Arctic cyclones have not been hazardous to ships and that ships are resilient to the rough sea conditions caused by Arctic cyclones.