{"title":"Geological mapping by thermal inertia derived from long-term maximum and minimum temperatures of ASTER data","authors":"Yukie Asano, Y. Yamaguchi, S. Kodama","doi":"10.1144/qjegh2022-050","DOIUrl":"https://doi.org/10.1144/qjegh2022-050","url":null,"abstract":"Thermal inertia is a geophysical quantity used to characterize geological features. Apparent Thermal Inertia (ATI) is an alternative quantity to be derived from remotely sensed data. Calculation of the conventional ATI requires acquisition of a pair of daytime and night-time images taken within a short time interval that is often difficult to fulfill by satellite remote sensing due to orbit constraints. In this study, we proposed Long-term ATI (LATI) as a new alternative ATI by taking advantage of the large ASTER data archive.\u0000 Using the Cuprite area, Nevada, U.S., as a test site, ATI was calculated using an ASTER data pair obtained within 2 days. LATI was also calculated using a much further separated ASTER data pair; daytime on 5 August 2000 and night-time on 12 January 2012. These dates were chosen to represent the maximum and minimum yearly surface temperatures. There was a strong positive correlation between ATI and LATI. We can conclude that LATI is useful and superior to the conventional ATI, because the maximum and minimum land surface temperatures tend to converge on certain values and can be used to characterize surface geological features with minimal effects from temporal atmospheric and environmental conditions.\u0000 \u0000 Thematic collection:\u0000 This article is part of the Remote sensing for site investigations on Earth and other planets collection available at:\u0000 https://www.lyellcollection.org/topic/collections/remote-sensing-for-site-investigations-on-earth-and-other-planets\u0000","PeriodicalId":20937,"journal":{"name":"Quarterly Journal of Engineering Geology and Hydrogeology","volume":" ","pages":""},"PeriodicalIF":1.4,"publicationDate":"2022-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46045582","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
P. Mason, C. Bischoff, G. Hughes, C. Petrone, N. Varley, G. Nicholas, A. Ferretti
{"title":"Monitoring ground movement at Volcán de Colima, Mexico, using Sentinel-1 data and SqueeSAR\u0000 ®","authors":"P. Mason, C. Bischoff, G. Hughes, C. Petrone, N. Varley, G. Nicholas, A. Ferretti","doi":"10.1144/qjegh2022-047","DOIUrl":"https://doi.org/10.1144/qjegh2022-047","url":null,"abstract":"\u0000 Volcán de Colima is a highly active stratovolcano in western Mexico which presents a significant hazard to over 300,000 people who live within\u0000 ca\u0000 40 km of the volcano. Due to its persistent activity, the volcano is actively monitored and researched, and understanding the patterns of behaviour is vital to accurate hazard assessment.\u0000 \u0000 \u0000 Sentinel-1 SAR images from ascending and descending orbits allow 1D and 2D ground motions to be retrieved using multi-interferogram techniques. SqueeSAR\u0000 ®\u0000 ’s unique processing allows a better characterisation of subtle ground movements in remote, rural mountainous areas compared to many other multi-interferogram techniques. A dataset of 147 SAR scenes (2017-2019) has been processed to show patterns of lava subsidence (<150 mm of downward vertical deformation over 2 years), as well as volcano deflation and apparent westward lateral movement. These data indicate that viscous andesitic lava flows may remain mobile for years following eruption and emplacement, and that the entire volcanic edifice is subsiding.\u0000 \u0000 Despite the apparent quiescence, volcanic edifices can remain highly dynamic after the termination of explosive or effusive activity. We interpret that the western flank of Volcán de Colima may become steeper with time and may be of long-term concern for hazard assessment activities.\u0000 \u0000 Thematic collection:\u0000 This article is part of the Remote sensing for site investigations on Earth and other planets collection available at:\u0000 https://www.lyellcollection.org/topic/collections/remote-sensing-for-site-investigations-on-earth-and-other-planets\u0000","PeriodicalId":20937,"journal":{"name":"Quarterly Journal of Engineering Geology and Hydrogeology","volume":" ","pages":""},"PeriodicalIF":1.4,"publicationDate":"2022-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46619481","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}