{"id":2278,"date":"2021-01-05T09:30:25","date_gmt":"2021-01-05T09:30:25","guid":{"rendered":"https:\/\/lexis-project.eu\/web\/?p=2278"},"modified":"2021-02-19T18:50:35","modified_gmt":"2021-02-19T18:50:35","slug":"the-earthquake-and-tsunami-large-scale-pilot-exposes-its-workflow","status":"publish","type":"post","link":"https:\/\/lexis-project.eu\/web\/news\/the-earthquake-and-tsunami-large-scale-pilot-exposes-its-workflow\/","title":{"rendered":"The Earthquake and Tsunami large scale pilot exposes its workflow"},"content":{"rendered":"\n

In the LEXIS project, one of the objectives is to demonstrate running complex simulations under real-time deadlines, in order to get predictions in time for decision making. This is undertaken by combining tsunami inundation simulations and earthquake loss assessment, in an event-triggered workflow (an earthquake event) in a pilot of the project, called the Earthquake and Tsunami large scale pilot. This pilot has progressed well, and is now being opened up, especially to support the LEXIS Open Call initiative. Some of the results were also featured during the HPC for Urgent Computing workshop @ SC20, showing how common concerns are active in the HPC community.<\/p>\n\n\n\n

\"Figure1:<\/a>
Figure1: The Earthquake and Tsunami workflow<\/figcaption><\/figure><\/div>\n\n\n\n

How does the\npilot, shown in Figure 1, work? First, we need an up-to-date knowledge on\npossible victims and damage to structures, which is handled by a 24\/7 flow\naround the OpenBuildingMap system. It is updated out of OpenStreetMap data, and\nfeeds an exposure dataset, a fast, optimized structure providing access to the\nvulnerability of buildings around the world, including the people in those\nbuildings.<\/p>\n\n\n\n

The second element in\nthe pilot is the event triggered part. It is triggered when an earthquake event\nhappens, and has two branches: a fast path, and a precise path.<\/p>\n\n\n\n

The fast path is triggered with the early earthquake event information, which initially is only the hypocenter: the earthquake starting location, depth and magnitude. When such an event occurs, it starts a LEXIS workflow that computes a shakemap, fast tsunami simulations with TsunAWI, and a fast (aggregate) loss assessment from the exposure dataset. The key result is that TsunAWI optimisations have allowed us to see very fast runs with inundation on a coarse mesh of the area (Figure 2) sixty times faster than the more precise one, reaching as low as 5 seconds of runtime.<\/p>\n\n\n\n

\"Figure2:<\/a>
Figure2: Inundation maps for both a precise and a coarse mesh, showing how close the early one is. <\/figcaption><\/figure><\/div>\n\n\n\n

The precise\npath is triggered a few minutes afterwards, upon the reception of the\nearthquake moment tensor information. This activates another, more precise\nshakemap generation, a detailed loss assessment, and a precise tsunami\ninundation simulation on a finer mesh. And again the jobs are triggered via the\nLEXIS orchestration tools.<\/p>\n\n\n\n

The final part of this workflow is a satellite-based emergency mapping\nprocess, where remote sensing images are analyzed to produce fast damage\nassessment maps for affected areas (Izmir in Turkey is a recent example<\/a>). A core component here is the procedure for\nthe quick identification of potential area of interest by crossing event\nrelated datasets (i.e. shakemaps and inundation maps) with exposed assets,\nprioritizing them based on the potential impact. The fast identification of\nthose areas based on objective criteria allows a more aware and solid satellite\nimages acquisition process.<\/p>\n\n\n\n

One of the key elements of the workflow is that interfaces are\nstandardized and would allow for possible replacements and additional information,\nas well as using a core workflow infrastructure designed to intrude as little\nas possible into the working of individual elements of the flow. For example,\nmore tsunami simulations could be added, providing inundation maps to the areas\nof interest determination procedures. Additional shakemaps could be generated\nby seismic simulations. Such additions could run on the LEXIS infrastructure\nvia the Open Call mechanism, or be provided as urgent computing requests from\nother supercomputing centers.\n\nThis\nsums up this blog post about the Earthquake and Tsunami large scale pilot.\nThere are many more things to talk about in this pilot, linked to work that has\nalready been completed and work that is underway, and I hope we\u2019ll be able to\nshare them in other blog posts.\n\n\n\n<\/p>\n","protected":false},"excerpt":{"rendered":"

In the LEXIS project, one of the objectives is to demonstrate running complex simulations under real-time deadlines, in order to get predictions in time for decision making. This is undertaken by combining tsunami inundation simulations and earthquake loss assessment, in an event-triggered workflow (an earthquake event) in a pilot of the project, called the Earthquake […]<\/p>\n","protected":false},"author":1,"featured_media":1269,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[1],"tags":[],"yoast_head":"\r\nThe Earthquake and Tsunami large scale pilot exposes its workflow - LEXIS project \/ LEXIS Platform<\/title>\r\n<meta name=\"robots\" content=\"noindex, follow\" \/>\r\n<meta property=\"og:locale\" content=\"en_GB\" \/>\r\n<meta property=\"og:type\" content=\"article\" \/>\r\n<meta property=\"og:title\" content=\"The Earthquake and Tsunami large scale pilot exposes its workflow - LEXIS project \/ LEXIS Platform\" \/>\r\n<meta property=\"og:description\" content=\"In the LEXIS project, one of the objectives is to demonstrate running complex simulations under real-time deadlines, in order to get predictions in time for decision making. 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