| Abstract: | We describe a low-cost application of digital photogrammetry using commercially available photogrammetric software and oblique photographs taken with an off-the-shelf digital camera to create sequential digital elevation models (DEMs) of a lava dome that grew during the 2004–2008 eruption of Mount St. Helens (MSH) volcano. Renewed activity at MSH provided an opportunity to devise and test this method, because it could be validated against other observations of this well-monitored volcano. The datasets consist of oblique aerial photographs (snapshots) taken from a helicopter using a digital single-lens reflex camera. Twelve sets of overlapping digital images of the dome taken during 2004–2007 were used to produce DEMs and to calculate lava dome volumes and extrusion rates. Analyses of the digital images were carried out using photogrammetric software to produce three-dimensional coordinates of points identified in multiple photos. The evolving morphology of the dome was modeled by comparing successive DEMs. Results were validated by comparison to volume measurements derived from traditional vertical photogrammetric surveys by the US Geological Survey Cascades Volcano Observatory. Our technique was significantly less expensive and required less time than traditional vertical photogrammetric techniques; yet, it consistently yielded volume estimates within 5% of the traditional method. This technique provides an inexpensive, rapid assessment tool for tracking lava dome growth or other topographic changes at restless volcanoes. |
| Genre: | Article |
| ProdID: | 70041419 |
| Citation Author: | Diefenbach, Angela K.; Crider, Juliet G.; Schilling, Steve P.; Dzurisin, Daniel |
| Citation Contributing Office: | Volcano Science Center |
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| Citation End Page: | 587 |
| Citation Issue: | 2 |
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| Citation Language: | English |
| Citation Larger Work Title: | Bulletin of Volcanology |
| Citation LatN: | 46.2012 |
| Citation LatS: | 46.181196 |
| Citation LonE: | -122.204405 |
| Citation LonW: | -122.184397 |
| Citation Month: | MAR |
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| Citation Phsyical Description: | 9 p. |
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| Citation Publisher: | Springer |
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| Citation Search Results Text: | Rapid, low-cost photogrammetry to monitor volcanic eruptions: an example from Mount St. Helens, Washington, USA; 2012; Article; Journal; Bulletin of Volcanology; Diefenbach, Angela K.; Crider, Juliet G.; Schilling, Steve P.; Dzurisin, Daniel |
| Citation Start Page: | 579 |
| Citation Volume: | 74 |
| Citation Year: | 2012 |
| Type: | citation/reference |
| Text: | Rapid, low-cost photogrammetry to monitor volcanic eruptions: an example from Mount St. Helens, Washington, USA; 2012; Article; Journal; Bulletin of Volcanology; Diefenbach, Angela K.; Crider, Juliet G.; Schilling, Steve P.; Dzurisin, Daniel |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| URL (DIGITAL OBJECT IDENTIFIER): | http://dx.doi.org/10.1007/s00445-011-0548-y |
| Date Other: | Tue, 11 Dec 2012 00:00 -0600 |
| Publisher: | Springer |
