Learn more about other projects by our landslide team, including how COOLR is being used for model validation. More information about the Cooperative Open Online Landslide Repository (COOLR) and citizen science can be found on the About page.

These projects are also demonstrated on Landslide Viewer.

Landslide Hazard Assessment for Situational Awareness (LHASA) Model

LHASA 2.0

The global Landslide Hazard Assessment for Situational Awareness version 2 (LHASA 2.0) maps areas of potential landslide hazard in real time. It improves upon LHASA 1.1 by incorporating landslide inventories from around the world within a machine learning framework that estimate the relative probability of landslide occurrence. LHASA 2.0 relies on the following variables: snow mass, soil moisture, slope, distance to faults, lithologic strength, antecedent rainfall, and current daily rainfall. Current and antecedent rainfall are derived from the Global Precipitation Measurement (GPM) Integrated Multi-SatellitE Retrievals for GPM (IMERG), while forecasted precipitation comes from GEOS-FP, a global weather prediction system. In addition, LHASA 2.0 estimates the potential exposure of human population and roads to landslide hazard and maps the basins likely to experience post-fire debris flows. The model was validated with reference to the Global Landslide Catalog (GLC) and several other inventories of rainfall-triggered landslide events. LHASA 2.0 is twice as likely to predict the occurrence of historical landslides as LHASA 1.1, while having the same false positive rate. LHASA 2.0 is open-source and is produced at a 1-km resolution.

LHASA 2.0 Exposure Analysis:

Landslide reporting is biased towards developed countries, which limits our understanding of landslides in developing countries. Therefore, we combined LHASA 2.0 with open-source datasets on population, roads, and infrastructure to estimate exposure to landslide hazards around the world. The exposure model fills major gaps in inventory-based estimates in developing countries with lower reporting capacity, while comparing favorably with existing datasets of rainfall-triggered landslide fatalities.

LHASA 2.0 Post-Fire Debris Flow Analysis:

Following wildfires in rugged and/or mountainous terrain, high intensity rainfall frequently leads to the cascading hazard of post fire debris flows (PFDFs). These flows can destroy infrastructure and take human lives. LHASA 2.0 also leverages global data to routinely assess the global potential for PFDF over steep, burned areas. This component remains in development with further updates to come.

Download the Version 2 software: https://github.com/nasa/lhasa

Current output: https://landslides.nasa.gov/viewer

Exposure Code: available upon request

PFDF Code: https://github.com/nasa/LHASA/tree/master/pfdf

Publications and Media

  1. Emberson, R., D. Kirschbaum, and T. Stanley. 2020. "New global characterisation of landslide exposure." Natural Hazards and Earth System Sciences, 20 (12): 3413-3424. doi:10.5194/nhess-20-3413-2020
  2. Khan, S., D. Kirschbaum, and T. Stanley. 2021. "Investigating the potential of a global precipitation forecast to inform landslide prediction." Weather and Climate Extremes, 33: 100364 10.1016/j.wace.2021.100364
  3. Stanley, T., Kirschbaum, D., Benz, G., Emberson, R., Amatya, P., Medwedeff, W., and Clark, Marin. (2021). Data-Driven Landslide Nowcasting at the Global Scale. Frontiers in Earth Science. 9. doi: 10.3389/feart.2021.640043.
An example of the LHASA v2 landslide nowcast layer in Landslide Viewer
An example of the LHASA 2.0 landslide nowcast in South and Central America. Red indicates larger populations exposed to landslide hazard. Orange and yellow indicate lesser population exposure. Image from Landslide Viewer.

LHASA 1.1

The global Landslide Hazard Assessment for Situational Awareness version 1.1 (LHASA 1.1) maps when and where landslides may occur. LHASA 1.1 incorporates IMERG precipitation data and landslide susceptibility data into a single heuristic decision tree. The global landslide susceptibility map considers slope, geology, road networks, fault zones, and forest loss. For model validation, Global Landslide Catalog (GLC) landslide inventories were used. Although LHASA 2.0 surpasses LHASA 1.1 in accuracy and features, LHASA 1.1 may be preferred by some users for its simplicity. LHASA 1.1 is open-source and is produced at a 1-km resolution.

Download the Version 1 software: https://github.com/nasa/lhasa

Current output: https://gpm.nasa.gov/precip-apps

Susceptibility Map: https://gpm.nasa.gov/sites/default/files/downloads/global-landslide-susceptibility-map-1-30-20.zip

Data archive for Version 1: https://disc.gsfc.nasa.gov/datasets/Global_Landslide_Nowcast_1.1/summary

 

Publications and media:

  1. Emberson, R., D. Kirschbaum, and T. Stanley. 2020. "New global characterisation of landslide exposure." Natural Hazards and Earth System Sciences, 20 (12): 3413-3424. doi: 10.5194/nhess-20-3413-2020.
  2. Kirschbaum, D. and Stanley, T. (2018). Satellite-Based Assessment of Rainfall-Triggered Landslide Hazard for Situational Awareness. Earth's Future. doi:10.1002/2017EF000715.
  3. "New NASA Model Finds Landslide Threats in Near Real-Time During Heavy Rains", NASA, Greenbelt, MD (March 22, 2018)
  4. Stanley, T., and D. B. Kirschbaum. 2017. "A heuristic approach to global landslide susceptibility mapping." Natural Hazards, 1-20. doi: 10.1007/s11069-017-2757-y.
An example of the landslide nowcast layer in Landslide Viewer
An example of the LHASA landslide nowcast in Europe. Red denotes high landslide risk and yellow denotes moderate landslide risk. Image from Landslide Viewer with added map legend.

Landslide Susceptibility Map

The landslide susceptibility map was developed to show where the terrain is most susceptible to landslides. The susceptibility model considers whether roads have been built, trees have been cut down or burned, a major tectonic fault is nearby, the local bedrock is weak, and/or the hillsides are steep. This map was combined with Global Precipitation Measurement (GPM) data to develop the LHASA 1.1 model.

Publications and Media

  1. Emberson, R., D. Kirschbaum, and T. Stanley. 2020. "New global characterisation of landslide exposure." Natural Hazards and Earth System Sciences, 20 (12): 3413-3424. doi:10.5194/nhess-20-3413-2020
  2. Stanley, T., & Kirschbaum, D. B. (2017). A heuristic approach to global landslide susceptibility mapping. Natural Hazards, 87(1), 145-164. doi:10.1007/s11069-017-2757-y
  3. Kirschbaum, D., Stanley, T., & Yatheendradas, S. (2016). Modeling landslide susceptibility over large regions with fuzzy overlay. Landslides, 13(3), 485-496. doi:10.1007/s10346-015-0577-2
  1. "A Global View of Landslide Susceptibility", NASA Earth Observatory, Greenbelt, MD (March 30, 2017)
Screenshot of Landslide Viewer with the susceptibility map and landslide points by fatalities visible
COOLR landslide points (in orange) and NASA landslide susceptibility (blue = low susceptibility, red = high susceptibility), in Central America. Notice that there are a lot of areas with high susceptibility but no landslide reports, signifying we need more data on past landslides to make sure our susceptibility maps are accurate. Image from Landslide Viewer with added map legend.

Global Landslide Catalog (GLC)

The NASA Global Landslide Catalog (GLC) is the largest openly available global inventory of rainfall-triggered mass movements known to date. The inventory was created at NASA Goddard Space Flight Center (GSFC) and currently contains more than 11,500 reports on landslides, debris flows, rock avalanches, etc. around the world. Reports of landslides are found primarily from online media, including news articles as well as other databases. The GLC has been compiled by scientists, interns and other colleagues at NASA GSFC. The GLC has been cited more than 75 times in peer-reviewed articles.

The GLC is a part of the Cooperative Open Online Landslide Repository (COOLR), and can be downloaded on Landslide Viewer. When COOLR is downloaded, GLC data can be found by the label "GLC" in the database field "event_import_source". For referencing the GLC in research, please see the Downloading the Data page. The GLC was used for model validation in both LHASA 1.1 and LHASA 2.0.

Download COOLR data: Landslide Viewer

Publications and Media

  1. Kirschbaum, D.B., Stanley, T., & Zhou, Y. (2015), Spatial and temporal analysis of a global landslide catalog. Geomorphology, 249, 4-15. doi:10.1016/j.geomorph.2015.03.016.
  2. Kirschbaum, D.B., Adler, R., Hong, Y., Hill, S., & Lerner-Lam, A. (2010), A global landslide catalog for hazard applications: method, results, and limitations. Natural Hazards, 52, 561-575. doi:10.1007/s11069-009-9401-4.
  3. "Global Landslide Catalog Aids View From Space", NASA, Greenbelt, MD (April 16, 2015)
Landslide events recorded in the GLC, 2007-2019
The distribution of 11,033 reported rainfall-triggered landslides in the GLC, 2007-2019 (last update 02.29.19). Each white dot represents one landslide event at that location. Image from NASA's Scientific Visualization Studio.

Semi-Automatic Landslide Detection (SALaD)

To simplify the ability to map landslides across a region, we developed an open-source Semi-Automatic Landslide Detection (SALaD) system. SALaD uses Object-based image analysis and machine learning to detect landslides from optical imagery. This system is especially useful after a disaster occurs where quick mapping is needed to help with situational awareness on the ground.

Download the code: https://github.com/nasa/SALaD

Publications and Media

  1. Amatya, P., Kirschbaum, D., Stanley, T., and Tanyas, H. (2021). Landslide mapping using object-based image analysis and open source tools. Engineering Geology. 282. doi: 10.1016/j.enggeo.2021.106000.
  2. Amatya, P., Kirschbaum, D., and Stanley, T. (2021). Rainfall-induced landslide inventories for Lower Mekong based on Planet imagery and a semi-automatic mapping method. Geoscience Data Journal. doi: 10.1002/gdj3.145.
Screenshot of LSALD data
Landslides induced by Hurricanes Eta and Iota near San Pedro Soloma, Guatemala mapped using SALaD and Planet imagery.

Related Pages

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Contact Us

For any questions related to this system, please contact landslide_support@nccs.nasa.gov.