Day 4

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Paper title Satellite-based rapid response landslide products generated during the 14 August 2021, Mw 7.2 Haiti earthquake.
Authors
  1. Pukar Amatya University of Maryland Baltimore County Speaker
  2. Robert Emberson UMBC/NASA GSFC Speaker
  3. Dalia Kirschbaum NASA and Goddard Space Flight Center
  4. Alexander Handwerger Joint Institute for Regional Earth System Science and Engineering, UCLA
  5. Mong-Han Huang University of Maryland
Form of presentation Poster
Topics
  • D1. Managing Risks
    • D1.01 Satellite EO for Geohazard Risks
Abstract text On 14 August 2021, a Mw 7.2 earthquake struck the Caribbean nation of Haiti. It had a ~10 km deep hypocenter near Petit-Trou-de-Nippes, approximately ~125 km west of the capital, Port-au-Prince. Preliminary ground survey revealed this event induced hundreds of landslides. Most of the landslide activity was centered around the Pic Macaya National Park area. We utilized both synthetic aperture radar (SAR) and optical imagery to generate rapid response products within one day of the event. We used the Semi-Automatic Landslide Detection (SALaD) system to map landslides that were visible in the Sentinel-2 imagery. However, pervasive cloud cover was an issue in most areas, in part due to Tropical Storm Grace which impacted the epicentral area on the 16th of August. Therefore, we also used a Google Earth Engine-based SAR backscatter change methodology to generate a landslide proxy heatmap that highlighted areas with high landslide density underneath the cloud cover. We will report on the accuracy of our optical and SAR-based landslide products and how this information was utilized by relief agencies on the ground. We will also conduct a detailed inventory mapping exercise using high-resolution Planet imagery and automated mapping techniques. We will outline the results from this mapping effort as well as provide a view on opportunities to support rapid response for multi-dimensional geohazard events moving forward.