Renewed Epicentral Distribution of Low Frequency Marsquakes by Varying-Parameter Polarization Analysis of InSight Data
文献类型：期刊论文
| 作者 | Wang, Xu1; Chen, Ling1,2; Wang, Xin3 |
| 刊名 | GEOPHYSICAL RESEARCH LETTERS
 |
| 出版日期 | 2023-08-28 |
| 卷号 | 50期号:16页码:11 |
| 关键词 | marsquake relocation back-azimuth polarization analysis InSight |
| ISSN号 | 0094-8276 |
| DOI | 10.1029/2023GL103896 |
| 英文摘要 | Accurate information about marsquake locations is crucial for understanding the tectonic activity, subsurface structures, and dynamics of Mars. We designed a varying-parameter scheme for polarization analysis to determine the back-azimuths of marsquakes. For two Martian meteorite impact events with ground-truth locations known from orbital images, our scheme yields back-azimuths that are similar to 5 degrees and similar to 14 degrees closer to the true values than those reported previously, demonstrating our method's advantages in constraining back-azimuths. We applied this method to determine the back-azimuths of 44 Low Frequency marsquakes and 39 were reliably relocated. Nearly half of these marsquakes occur in Cerberus Fossae, while the rest are broadly distributed, including along the dichotomy boundary and within the northern lowlands and southern highlands. Although further studies are required to understand the mechanisms of these marsquakes, the widespread seismicity implies that present-day Mars, especially the ancient southern highlands, is more tectonically active than previously thought. Plain Language Summary Identifying seismic activity on Mars is crucial for advancing our understanding of the planet's present-day properties and tectonic processes. From February 2019 to December 2022, the InSight seismograph captured nearly one hundred Low Frequency marsquakes. As these marsquakes have similar ground vibration characteristics to tectonic earthquakes, they are important to understand tectonic-related activities on Mars. However, there is only a single seismograph on Mars, and some of the data for Low Frequency marsquakes are noisy, making it challenging to precisely determine their locations. To improve the accuracy of marsquake locations, we devised a scheme using sliding time and frequency windows to effectively constrain the orientation of marsquakes relative to the seismograph. With this method, we successfully relocated 39 Low Frequency marsquakes. Our new findings indicate that a significant portion, approximately half, of these marsquakes are concentrated in the Cerberus Fossae region, while the remaining events are distributed across various tectonic units. Interestingly, we have also identified marsquakes within the ancient southern highlands, an area that has previously had limited reports of seismic activity. Although the origin of marsquakes may differ from region to region, the widespread distribution of marsquakes suggests that Mars is more tectonically active than previously thought. |
| WOS关键词 | SINGLE-STATION ; IMPACT CRATERS ; MARS ; SEISMICITY ; THICKNESS ; EVOLUTION ; LOCATION ; PLANITIA ; EARTH |
| 资助项目 | We acknowledge NASA, CNES, their partner agencies and Institutions (UKSA, SSO, DLR, JPL, IPGP-CNRS, ETHZ, IC, and MPS-MPG) and the flight operations team at JPL, SISMOC, MSDS, IRIS-DMC, and PDS for providing SEED SEIS data. We thank Editor Kevin Lewis and ; NASA[2022YFF0503203] ; CNES, their partner agencies and Institutions (UKSA)[42004041] ; National Key Ramp;amp;D Program of China[42288201] ; National Key Ramp;amp;D Program of China[2021T140659] ; National Natural Science Foundation of China ; China Postdoctoral Science Foundation ; [MPS-MPG] |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:001054795900001 |
| 出版者 | AMER GEOPHYSICAL UNION |
| 资助机构 | We acknowledge NASA, CNES, their partner agencies and Institutions (UKSA, SSO, DLR, JPL, IPGP-CNRS, ETHZ, IC, and MPS-MPG) and the flight operations team at JPL, SISMOC, MSDS, IRIS-DMC, and PDS for providing SEED SEIS data. We thank Editor Kevin Lewis and ; We acknowledge NASA, CNES, their partner agencies and Institutions (UKSA, SSO, DLR, JPL, IPGP-CNRS, ETHZ, IC, and MPS-MPG) and the flight operations team at JPL, SISMOC, MSDS, IRIS-DMC, and PDS for providing SEED SEIS data. We thank Editor Kevin Lewis and ; NASA ; NASA ; CNES, their partner agencies and Institutions (UKSA) ; CNES, their partner agencies and Institutions (UKSA) ; National Key Ramp;amp;D Program of China ; National Key Ramp;amp;D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; We acknowledge NASA, CNES, their partner agencies and Institutions (UKSA, SSO, DLR, JPL, IPGP-CNRS, ETHZ, IC, and MPS-MPG) and the flight operations team at JPL, SISMOC, MSDS, IRIS-DMC, and PDS for providing SEED SEIS data. We thank Editor Kevin Lewis and ; We acknowledge NASA, CNES, their partner agencies and Institutions (UKSA, SSO, DLR, JPL, IPGP-CNRS, ETHZ, IC, and MPS-MPG) and the flight operations team at JPL, SISMOC, MSDS, IRIS-DMC, and PDS for providing SEED SEIS data. We thank Editor Kevin Lewis and ; NASA ; NASA ; CNES, their partner agencies and Institutions (UKSA) ; CNES, their partner agencies and Institutions (UKSA) ; National Key Ramp;amp;D Program of China ; National Key Ramp;amp;D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; We acknowledge NASA, CNES, their partner agencies and Institutions (UKSA, SSO, DLR, JPL, IPGP-CNRS, ETHZ, IC, and MPS-MPG) and the flight operations team at JPL, SISMOC, MSDS, IRIS-DMC, and PDS for providing SEED SEIS data. We thank Editor Kevin Lewis and ; We acknowledge NASA, CNES, their partner agencies and Institutions (UKSA, SSO, DLR, JPL, IPGP-CNRS, ETHZ, IC, and MPS-MPG) and the flight operations team at JPL, SISMOC, MSDS, IRIS-DMC, and PDS for providing SEED SEIS data. We thank Editor Kevin Lewis and ; NASA ; NASA ; CNES, their partner agencies and Institutions (UKSA) ; CNES, their partner agencies and Institutions (UKSA) ; National Key Ramp;amp;D Program of China ; National Key Ramp;amp;D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation ; We acknowledge NASA, CNES, their partner agencies and Institutions (UKSA, SSO, DLR, JPL, IPGP-CNRS, ETHZ, IC, and MPS-MPG) and the flight operations team at JPL, SISMOC, MSDS, IRIS-DMC, and PDS for providing SEED SEIS data. We thank Editor Kevin Lewis and ; We acknowledge NASA, CNES, their partner agencies and Institutions (UKSA, SSO, DLR, JPL, IPGP-CNRS, ETHZ, IC, and MPS-MPG) and the flight operations team at JPL, SISMOC, MSDS, IRIS-DMC, and PDS for providing SEED SEIS data. We thank Editor Kevin Lewis and ; NASA ; NASA ; CNES, their partner agencies and Institutions (UKSA) ; CNES, their partner agencies and Institutions (UKSA) ; National Key Ramp;amp;D Program of China ; National Key Ramp;amp;D Program of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Postdoctoral Science Foundation ; China Postdoctoral Science Foundation |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/110700]  |
| 专题 | 地质与地球物理研究所_岩石圈演化国家重点实验室 地质与地球物理研究所_中国科学院地球与行星物理重点实验室 |
| 通讯作者 | Chen, Ling |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing, Peoples R China 2.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing, Peoples R China 3.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, Xu,Chen, Ling,Wang, Xin. Renewed Epicentral Distribution of Low Frequency Marsquakes by Varying-Parameter Polarization Analysis of InSight Data[J]. GEOPHYSICAL RESEARCH LETTERS,2023,50(16):11. |
| APA | Wang, Xu,Chen, Ling,&Wang, Xin.(2023).Renewed Epicentral Distribution of Low Frequency Marsquakes by Varying-Parameter Polarization Analysis of InSight Data.GEOPHYSICAL RESEARCH LETTERS,50(16),11. |
| MLA | Wang, Xu,et al."Renewed Epicentral Distribution of Low Frequency Marsquakes by Varying-Parameter Polarization Analysis of InSight Data".GEOPHYSICAL RESEARCH LETTERS 50.16(2023):11. |
入库方式： OAI收割
来源：地质与地球物理研究所
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