Using remote sensing techniques to identify geomorphic modifications caused by landslide tsunamis

Author(s)

Trent Adams

Faculty Mentor(s)

Breanyn MacInnes (Geological Sciences), Jennifer Lipton (Geography), Lisa Ely (Geological Sciences)

Abstract

When a large landslide falls into a deep body of water it can produce giant tsunami waves capable of causing widespread geomorphic change to landscapes. What changes occur and how long impacts from landslide tsunamis persist in the geologic record is not well understood. Landslide tsunamis often occur in relatively recently deglaciated regions, such as Alaska in the U.S. and in Greenland. In the last century four of the largest historic landslide tsunamis occurred in these regions that caused vegetation loss, reorganization of stream channel networks, and the formation of unique geomorphic features indicative of landslide tsunamis. We used remote sensing techniques to analyze satellite images and digital elevation models of sites where landslide tsunamis have occurred in the past to determine what geomorphic modifications were caused and to assess the timeframe at which modifications remain preserved in the geologic record. Our methods of event identification can be applied to other historic landslide tsunami sites and can potentially be used to identify unknown historic landslide tsunamis.

Keywords: Landslides, tsunamis, modifications

Presentation

4 thoughts on “Using remote sensing techniques to identify geomorphic modifications caused by landslide tsunamis”

  1. Very well organized presentation on an interesting and relevant topic. These methods represent a useful advance in the analysis of remote landslide-generated tsunamis. How long would you expect the difference in vegetation index to be visible?

  2. Thanks, Trent. I really appreciated your presentation!
    I hope your work this summer will be enjoyable and profitable.
    Jim Gartrell

Leave a Reply

Your email address will not be published. Required fields are marked *