{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,12]],"date-time":"2025-10-12T02:08:35Z","timestamp":1760234915540,"version":"build-2065373602"},"reference-count":43,"publisher":"MDPI AG","issue":"7","license":[{"start":{"date-parts":[[2021,7,7]],"date-time":"2021-07-07T00:00:00Z","timestamp":1625616000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"National Key R&amp;D Program of China","award":["2018YFC1503806"],"award-info":[{"award-number":["2018YFC1503806"]}]},{"name":"Earthquake Science Spark Program","award":["XH16059"],"award-info":[{"award-number":["XH16059"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["IJGI"],"abstract":"<jats:p>Studying the temporal and spatial evolution trends in earthquakes in an area is beneficial for determining the earthquake risk of the area so that local governments can make the correct decisions for disaster prevention and reduction. In this paper, we propose a new method for analyzing the temporal and spatial evolution trends in earthquakes based on earthquakes of magnitude 3.0 or above from 1980 to 2019 in California and Nevada. The experiment\u2019s results show that (1) the frequency of earthquake events of magnitude 4.5 or above present a relatively regular change trend of decreasing\u2013rising in this area; (2) by using the weighted average center method to analyze the spatial concentration of earthquake events of magnitude 3.0 or above in this region, we find that the weighted average center of the earthquake events in this area shows a conch-type movement law, where it moves closer to the center from all sides; (3) the direction of the spatial distribution of earthquake events in this area shows a NW\u2013SE pattern when the standard deviational ellipse (SDE) method is used, which is basically consistent with the direction of the San Andreas Fault Zone across the north and south of California; and (4) the spatial distribution pattern of the earthquake events in this region is found to be clustered using the global spatial autocorrelation analysis method. This study provides a new perspective for the exploration of the temporal and spatial evolution trends in earthquakes and understanding the earthquake risk in an area.<\/jats:p>","DOI":"10.3390\/ijgi10070465","type":"journal-article","created":{"date-parts":[[2021,7,7]],"date-time":"2021-07-07T12:31:25Z","timestamp":1625661085000},"page":"465","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":8,"title":["Temporal and Spatial Evolution Analysis of Earthquake Events in California and Nevada Based on Spatial Statistics"],"prefix":"10.3390","volume":"10","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-9658-9483","authenticated-orcid":false,"given":"Weifeng","family":"Shan","sequence":"first","affiliation":[{"name":"Institute of Geophysics, China Earthquake Administration, Beijing 100081, China"},{"name":"School of Emergency Management, Institute of Disaster Prevention, Langfang 065201, China"}]},{"given":"Zhihao","family":"Wang","sequence":"additional","affiliation":[{"name":"School of Emergency Management, Institute of Disaster Prevention, Langfang 065201, China"}]},{"given":"Yuntian","family":"Teng","sequence":"additional","affiliation":[{"name":"Institute of Geophysics, China Earthquake Administration, Beijing 100081, China"}]},{"given":"Maofa","family":"Wang","sequence":"additional","affiliation":[{"name":"School of Computer and Information Security, Guilin University of Electronic Science and Technology, Guilin 541004, China"}]}],"member":"1968","published-online":{"date-parts":[[2021,7,7]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"194","DOI":"10.1080\/01944360208976265","article-title":"Plan quality and mitigating damage from natural disasters: A case study of the Northridge earthquake with planning policy considerations","volume":"68","author":"Nelson","year":"2002","journal-title":"J. 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