Fault & Flow v0.3.0 — Explore, Replay & Share Assam

Fault & Flow adds an optional journey from Assam and the Brahmaputra to a visitor-chosen water scenario, dry/scenario comparison and recorded earthquake history.

• Optional 13-second showcase with pause, skip and replay; reduced motion uses manual steps. Terrain loading can add time.
• Attributed 1080 x 1920 portrait and 1200 x 630 landscape PNGs include context, scientific limits and the atlas URL.
• Real-render social preview, app icons and improved comparison controls, with English and Assamese support.
• Release-candidate fixes keep production preview assets reachable, mobile depth readouts clear and Assamese content semantically labelled.

Educational sandbox: not a forecast, hazard map or prediction tool. Earthquakes cannot be predicted. Flood inputs are visitor-chosen scenarios. Browser-dependent WebM retains PNG/link fallbacks.

Real-device performance, manual assistive-technology testing and native-speaker Assamese review remain pending.

Fault & Flow v0.2.0 - Interactive Assam Atlas

Explore Assam's earth and water in your browser. This first public atlas release brings real terrain, recorded earthquake history and hands-on flood scenarios together in English and Assamese.

Open the live atlas · Read the guide

Explore

• River & flood: choose water depth and optional inflow on real Copernicus terrain. Compare dry terrain with your running scenario using a draggable divider; inspect depth bands and an A–B cross-section.
• Earthquakes: scrub recorded USGS M5+ history, filter magnitude bands and open an event's original record. Grounded symbols use colour and size to describe magnitude.
• District discovery: search 35 names from the committed OpenStreetMap extract, focus an administration-centre anchor and browse the nearest catalogue records and regional flood-report links.
• Share a story: save attributed portrait or full-map PNGs, record up to eight seconds of silent portrait WebM, or share a validated view link.
• Explore comfortably: pointer-centred zoom, map dragging, touch pan/pinch, keyboard controls, Lite rendering and an optional tour. A secondary “Why Assam shakes” explainer illustrates plate collision and synthetic building motion.

Data and limits

Educational sandbox. Not a forecast, hazard map, prediction tool or warning service. Earthquakes cannot be predicted. Flood inputs are values the visitor chooses. Rings and building motion are illustrations, not local shaking or damage estimates. District points are administration-centre anchors, not district boundaries or hazard scores.

The source snapshot contains 289 recorded M5+ events in the NE India bounding-box subset through the 3 October 2026 UTC cutoff. Early catalogue coverage is incomplete. The Pages workflow refreshes the historical subset before checked builds and on a daily schedule; it does not create flood forecasts or live alerts.

Validation

npm run verify passed formatting, lint, TypeScript, 170 unit tests and the production build. The atlas implementation passed 64 browser checks, 14 release checks and 26 screenshot/layout/accessibility checks at 1440px and 390px. Physical Android performance, manual screen-reader testing and native-speaker Assamese review remain open. Browser WebM support varies; PNG and link sharing remain available.

Download and run

The attached GIF and screenshots are real browser captures. GitHub's source archives contain the application; use Node 20+, npm ci and npm run dev to run locally. This is a browser app, not an installable desktop executable.

Software is MIT; data retains its source licences. Terrain renders are produced using Copernicus WorldDEM-30 © DLR e.V. 2010-2014 and © Airbus Defence and Space GmbH 2014-2018 provided under COPERNICUS by the European Union and ESA; all rights reserved. The organisations in charge of the Copernicus programme by law or by delegation do not incur any liability for any use of the Copernicus WorldDEM-30. Natural Earth geography; earthquake catalog data courtesy of the U.S. Geological Survey; district names © OpenStreetMap contributors, ODbL. Data sources and licences.