Global Landslide Nowcast

Background: The global Landslide Hazard Assessment for Situational Awareness (LHASA) model is developed to provide situational awareness of landslide hazards for a wide range of users. Precipitation is a common trigger of landslides. The Integrated Multi-satellitE Retrievals for GPM (IMERG) data shows recent precipitation, updated every thirty minutes. A LHASA landslide “nowcast” is created by comparing GPM data from the last seven days to the long-term precipitation record provided by the Tropical Rainfall Measuring Mission (TRMM) Multi-satellite Precipitation Analysis (TMPA). Because IMERG data is only available starting in 2014, the record of historical rainfall was established by TMPA, comparing 2001-present. The TMPA rainfall probability distributions were then compared to that of IMERG and the rainfall thresholds were adjusted so that the IMERG data more closely mapped to those of the TMPA archive. The past 7 days of rainfall are considered, with each day is weighted according to their date before present, with the last twenty-four hours having the most impact.Data Visualization: Landslide Nowcast is shown using a Two Color Ramp (yellow and red). Values represent Moderate (yellow) and High (red) risk of potential landslide.Update Frequency: 3 Hour latency Suggested Usage: In places where precipitation is unusually high, the susceptibility of the terrain is evaluated, which includes quantitative information on if: roads have been built; trees have been cut down or burned; a major tectonic fault is nearby; the local bedrock is weak; the hillsides are steep.Further Reference: Learn more about Global Landslide Model Learn more about GPM's science objectives. Learn more about GPM's applications.

Data and Resources

Field Value
dcat_issued 2019-08-23T13:54:02.000Z
dcat_modified 2023-09-29T13:50:19.000Z
dcat_publisher_name NASA ArcGIS Online
guid https://www.arcgis.com/home/item.html?id=a7361fa689df4624974c2dd263f9a2a5
Tags
  • Landslide
  • NASA Disasters Program
  • NRT
  • Near-Real Time
isopen False
metadata_created 2025-09-18T18:11:37.287779
metadata_modified 2025-09-18T18:11:37.287785
notes <div style='text-align:Left;'><div><p><span style='font-weight:bold;'>Background: </span><span>The global Landslide Hazard Assessment for Situational Awareness (LHASA) model is developed to provide situational awareness of landslide hazards for a wide range of users. Precipitation is a common trigger of landslides. The Integrated Multi-satellitE Retrievals for GPM (IMERG) data shows recent precipitation, updated every thirty minutes. A LHASA landslide “nowcast” is created by comparing GPM data from the last seven days to the long-term precipitation record provided by the Tropical Rainfall Measuring Mission (TRMM) Multi-satellite Precipitation Analysis (TMPA). Because IMERG data is only available starting in 2014, the record of historical rainfall was established by TMPA, comparing 2001-present. The TMPA rainfall probability distributions were then compared to that of IMERG and the rainfall thresholds were adjusted so that the IMERG data more closely mapped to those of the TMPA archive. The past 7 days of rainfall are considered, with each day is weighted according to their date before present, with the last twenty-four hours having the most impact.</span></p><p><span style='font-weight:bold;'>Data Visualization: </span><span>Landslide Nowcast is shown using a Two Color Ramp (yellow and red). Values represent Moderate (yellow) and High (red) risk of potential landslide.</span></p><p><span style='font-weight:bold;'>Update Frequency: </span><span>3 Hour latency Suggested Usage: In places where precipitation is unusually high, the susceptibility of the terrain is evaluated, which includes quantitative information on if: roads have been built; trees have been cut down or burned; a major tectonic fault is nearby; the local bedrock is weak; the hillsides are steep.</span></p><p><span style='font-weight:bold;'>Further Reference: </span></p><p><a href='https://pmm.nasa.gov/applications/global-landslide-model'><span>Learn more about Global Landslide Model </span></a></p><p><a href='https://pmm.nasa.gov/gpm/science-objectives'><span>Learn more about GPM's science objectives. </span></a></p><p><a href='https://www.nasa.gov/mission_pages/GPM/applications/index.html'><span>Learn more about GPM's applications.</span></a></p></div></div>
num_resources 2
num_tags 4
title Global Landslide Nowcast
url https://disasters.amerigeoss.org/datasets/NASA::global-landslide-nowcast