nexustandards.com/hazards · 8 taught
Hazards and Disaster Risk Reduction
NRS-H17 Fault shaking and rupture; NRS-H18 Eruption products and unrest
8standards1discipline
Illustrative: wavefronts spreading from a source across a surface, seismic P and S fronts, a tsunami shoaling, or interfering sources
Risk Academy, led by the Nexus Consortium · Hazards, Disasters and Resilience · Department of Hazard Science
Earthquakes, tsunamis, volcanoes, landslides and the measures behind their maps
Earthquakes, volcanoes, tsunamis and landslides
Geophysical hazards are read through their intensity measures: MMI and peak ground acceleration for shaking, travel time for a tsunami, runout for a landslide, and the return periods a probabilistic seismic hazard analysis puts on them.
- Department
- Department of Hazard Science
- Courses
- In preparation
- Levels
- L1 Introductory, L2 Intermediate
- Labs
- Map lab, Geo quiz, Exposure lab, GeoAI lab, Trigger lab
- Earthquake source, shaking and intensity
- Seismic hazard assessment
- Tsunami generation and warning
- Volcanic hazards and monitoring
- Landslides and debris flows
- Ground subsidence
- Space weather
- Secondary and cascading geohazards
- Building codes and seismic retrofit
Courses in development extend the scope to one further subject: Seismic risk reduction through codes and retrofit.
02Maps
Build a twin of any place
Search any place or open the world; the layers and generators follow earthquakes, volcanoes, tsunamis and landslides on the planet map, the globe and in 3D.
Hazards, Disasters and ResilienceAny placeTwin builder
- Terrain 59 to 3,044 m
- 2 reference earthquakes, M7.5 to M7.8
- 3,643,786 people in the box, 2020
- Earthquakes M4.5 and above, past week: read live when the 3D twin opens
- USGS ShakeMap intensity contours: read live when the 3D twin opens
Drag to move, right drag or Shift with a drag to turn and tilt, Ctrl with the wheel to zoom. Keyboard: arrows move, Shift with arrows turn and tilt, + and – zoom, 0 resets, V steps through the views, Escape clears.
2 live layers, checked 17 Oct 2026
Places5
Layers5
iCredits
- Terrain Surface height in whole metres on the plan's grid of cells about 785 by 985 metres; the Taurus foothills and the Amanos range frame the fault valley, the box rises from 59 to 3,044 m. 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. read 2026-10-17. Estimate: A digital surface model: trees and roofs are in the heights. Relief exaggeration is printed on the stage.
- Reference earthquakes The two main shocks of 6 February 2023: origin, magnitude, depth, time and review status from the USGS detail record, the hypocentre drawn below the ground. U.S. Geological Survey Earthquake Hazards Program. read 2026-10-17. Estimate: Reported solutions as reviewed by the USGS; magnitudes and depths carry the USGS stated uncertainties, which the event page links rather than restates.
- Population count 2020, WorldPop 1 km People per cell in 2020, summed from the national 1 km raster of Turkiye on a grid of 160 by 120 cells; the Syrian part of the box, south of the border, is empty because the national file stops there. WorldPop (www.worldpop.org), University of Southampton, 2020 UN-adjusted 1 km, CC BY 4.0; summed per cell. read 2026-10-17. Estimate: A modelled 2020 estimate adjusted to UN totals; never a count of people affected; cells outside the national file are empty.
- Earthquakes M4.5 and above, past week (live) Reviewed and automatic seismic solutions of the past week inside the box, with magnitude and depth, read from the world feed and filtered to the box in your browser. U.S. Geological Survey; reported detections, automatic solutions preliminary; never a warning. Live: this page requests earthquake.usgs.gov when the layer is opened; the data date is printed with it. Estimate: Reported detections; automatic solutions are preliminary; never a warning.
- USGS ShakeMap intensity contours The ShakeMap MMI contours of each main shock draped on the terrain, read from the cont_mmi.json file the event's detail record names; the exposure instrument reads the PAGER exposure table the same record names. U.S. Geological Survey ShakeMap and U.S. Geological Survey PAGER (preliminary, automatically generated; see the USGS disclaimers), with the product version and time. Live: this page requests earthquake.usgs.gov when the layer is opened; the data date is printed with it. Estimate: Preliminary and automatically generated; PAGER levels and exposures are USGS estimates with stated uncertainty, never a warning or a loss figure of the Academy.
Why this place: The sequence of 6 February 2023 put two events of M7 and above on the East Anatolian fault within nine hours, with reviewed USGS solutions, ShakeMap, PAGER and ground-failure products and a red PAGER alert. One box of about 140 by 130 kilometres holds both epicentres, Kahramanmaras and Gaziantep and the fault valley between the Taurus foothills and the Amanos range, so intensity against distance, exposure and warning lead time are taught on one place. Copernicus DEM GLO-30 covers the box in six tiles and WorldPop gives a 2020 count per cell for the Turkiye part.
Flat plan of the same data: relief, the two epicentres with magnitude and depth, the WorldPop count grid and the numbers below. The 3D twin opens on devices that can draw it, once its data and code have been checked.
The boundaries, names and designations shown do not imply any judgement on the legal status of any territory, or any endorsement or acceptance of such boundaries. Countries: Natural Earth (public domain).
03Live map
Hazards now in Türkiye
Flood water, active fires, heavy rain and smoke, beside where people live, over Türkiye.
The interactive map needs JavaScript; the layer list and sources are below.
Layers 3
Hazards now
Keyboard, with the map focused
Hold Ctrl or ⌘ and scroll to zoom
Latest available
NASA GIBS / EOSDIS · ASTER GDEM (METI, NASA) · Blue Marble (NASA) · © OpenStreetMap contributors (ODbL) · Natural Earth
Loading the latest NASA imagery.
Drag to move. Ctrl or ⌘ and scroll, pinch or the buttons to zoom; hover for the values under the pointer; reset returns to the region.
Hazards now, framed on Türkiye.Satellite and model products as NASA publishes them, each with its own date. They are indicators, not assessments of any place.
Data: NASA GIBS · ASTER GDEM · Blue Marble · © OpenStreetMap contributors · Natural Earth · NASA EONET · U.S. Geological SurveySources and licences
- We acknowledge the use of imagery provided by services from NASA's Global Imagery Browse Services (GIBS), part of NASA's Earth Science Data and Information System (ESDIS). Colours redrawn from the published colour map; values averaged into H3 cells where shown (modified). NASA open data
- We acknowledge the use of imagery provided by services from NASA's Global Imagery Browse Services (GIBS), part of NASA's Earth Science Data and Information System (ESDIS). Colours redrawn from the published colour map; values averaged into H3 cells where shown (modified). NASA open data
- VIIRS near-real-time products (flood, land surface temperature, snow cover, corrected reflectance), NASA LANCE; imagery via NASA GIBS. Colours redrawn from the published colour map; values averaged into H3 cells where shown (modified). NASA open data
- NASA Fire Information for Resource Management System (FIRMS), VIIRS 375 m active fire product, NASA LANCE; vector tiles via NASA GIBS. Colours redrawn from the published colour map; values averaged into H3 cells where shown (modified). NASA open data
- GPM IMERG precipitation, NASA Precipitation Processing System; distributed by the NASA Goddard Earth Sciences Data and Information Services Center (GES DISC); imagery via NASA GIBS. Colours redrawn from the published colour map; values averaged into H3 cells where shown (modified). NASA open data
- MODIS and VIIRS atmosphere products, NASA LANCE and LAADS DAAC; imagery via NASA GIBS. Colours redrawn from the published colour map; values averaged into H3 cells where shown (modified). NASA open data
- Center for International Earth Science Information Network (CIESIN), Columbia University. 2018. Gridded Population of the World, Version 4 (GPWv4): Population Density, Revision 11. NASA Socioeconomic Data and Applications Center (SEDAC). Licensed under CC BY 4.0. Colours redrawn from the published colour map; values averaged into H3 cells where shown (modified). doi:10.7927/H49C6VHW. CC BY 4.0
- ASTER GDEM is a product of METI and NASA (ASTER Global Digital Elevation Model V003, NASA LP DAAC); imagery via NASA GIBS. Colours redrawn from the published colour map; values averaged into H3 cells where shown (modified). Cite as: NASA/METI/AIST/Japan Spacesystems and U.S./Japan ASTER Science Team (2019). ASTER Global Digital Elevation Model V003. doi:10.5067/ASTER/ASTGTM.003. NASA open data
- Made with Natural Earth. Free vector and raster map data @ naturalearthdata.com. Public domain
- © OpenStreetMap contributors (ODbL), via NASA GIBS (coastlines, boundaries, roads and place names). Colours redrawn from the published colour map; values averaged into H3 cells where shown (modified). ODbL
- Blue Marble, NASA Earth Observatory; imagery via NASA GIBS. Colours redrawn from the published colour map; values averaged into H3 cells where shown (modified). NASA open data
- Context on the globe and flat map: coastlines, boundaries, roads and place names from NASA GIBS reference layers (OpenStreetMap data, ODbL, © OpenStreetMap contributors); Blue Marble imagery as an optional base; 3D terrain and the elevation read-out from the ASTER GDEM elevation colour index (5 m to 200 m classes, exaggerated for legibility). Boundaries are drawn as published and imply no position on any territory.
- Globe: MapLibre GL JS 6.9.1, BSD-3-Clause, © MapLibre contributors.
- Live events: NASA Earth Observatory Natural Event Tracker (EONET); events are indicative and keep their original source links.
- Live: NASA EONET Events are indicative, not authority warnings.
- Live: U.S. Geological Survey Events are indicative, not authority warnings.
- NASA GIBS: We acknowledge the use of imagery provided by services from NASA's Global Imagery Browse Services (GIBS), part of NASA's Earth Science Data and Information System (ESDIS).
- River discharge forecast, 30 days with range (GloFAS via Open-Meteo): Contains modified Copernicus Emergency Management Service information 2026; not a flood warning.
- Weather data by Open-Meteo.com (https://open-meteo.com/), licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/).
- Optional layers (20 sources in the layer list: live, forecast, observed and context) print their provider credit on the map and here when switched on; forecasts are model output and derived indices are estimates.
Layers and dates
- Flood water, 3-day composite: VIIRS Global Flood Product, NASA LANCE · 14 Oct 2026
- Active fires and thermal anomalies: VIIRS NOAA-20 375 m (FIRMS), NASA LANCE FIRMS · 13 Oct 2026
- Precipitation rate, daily mean: GPM IMERG, NASA GES DISC · 12 Oct 2026
- Aerosol optical depth, daily: VIIRS NOAA-20 Deep Blue AOD, NASA LANCE · 13 Oct 2026
- Population density, 2020: Population: CIESIN, Columbia University, Gridded Population of the World v4.11 (2018), NASA SEDAC, CC BY 4.0 · static
04The subject
The subject, methods and measures and debates and bodies
The field and its scope
For engineers, planners, emergency managers and analysts who need to read a seismic, tsunami, volcanic or landslide hazard product and know what it does and does not promise.
Quantities and units
Methods and their limits
Each method is listed with what it assumes and where it fails.
What the field debates
Bodies that set practice, and the data they publish
Bodies and standards are named so learners can find and apply their published work; the Academy teaches their use and links to the publisher, and no affiliation is implied.
05The method
From a catalogue to a design load: how a recurrence law becomes a ground motion an engineer designs for
An earthquake catalogue gives the rate of events by magnitude; a recurrence law extends it to the rare large ones; a Poisson assumption turns a rate into a chance in a stated period; a ground-motion model turns the magnitude at a distance into acceleration; the code fixes which exceedance chance the building must survive.
Sources: Cornell, Engineering seismic risk analysis (1968); Gutenberg and Richter, Frequency of earthquakes in California (1944); Stein, Geller and Liu, Why earthquake hazard maps often fail and what to do about it (2012); Pagani et al., OpenQuake engine: an open hazard (and risk) software for the Global Earthquake Model (2014); Allen, Wald and Worden, Intensity attenuation for active crustal regions (2012).
06Standards and evidence
Standards and evidence, research and evidence, profile, what is changing and learning
Nexus Standards it teaches and relies on
The Nexus Standards the discipline teaches toward, grouped by master standard, with the disciplines that teach each.
Nexus Standards at the AcademyThe Academy proposes how each discipline teaches toward the Nexus Standards; the mapping is open for public review.
Research and tools
Research and preprints as they are published, by discipline, with the faculty's other tools.
The hub lists the newest research and preprints for Earthquakes, volcanoes, tsunamis and landslides, each with its source and date. Open the research hub
Hazard families it covers
From the Academy's risk taxonomy: the discipline's own entries and those of its primary courses, with how many courses teach each.
Hazard families
- Earthquake5 courses
- Volcanic activity4 courses
- Tropical cyclone3 courses
- Tsunami3 courses
- Climate variability modes2 courses
- Drought2 courses
- Glacier and permafrost change2 courses
- Landslide and mass movement2 courses
- Riverine flood1 course
- Severe convective storm1 course
What is changing now
Recent developments in earthquakes, volcanoes, tsunamis and landslides, each with its source; sources checked on 16 October 2026.
Courses in this discipline
Courses for this discipline are in development; until they open, study it through the connected courses and open lessons below.
Courses from connected disciplines that also teach this field
Each course has its primary discipline elsewhere and teaches this field as part of its scope.
How the subject is practised in labs
07Console
How Earthquakes, volcanoes, tsunamis and landslides is taught, as a process you can run
Press Play to run this process from this page's own data.
08Practice
Practice, learning and connections
How technology helps and what risk it brings
Achievements in this discipline
Pathways that teach it
Where the subject is practised
- The Global Centre for Risk and Innovation (GCRI Canada)Climate and HazardsEarthquakes and geohazards
Field platforms of the ecosystem where the subject is studied and applied.
The three Foundry systems where it is practised
Across the ecosystem
09Take part
Take part in Hazards, Disasters and Resilience
Start from who you are.
10References
Core references and where to begin
Start with Cornell, then Wald, then Stein.
11Questions
Questions, answers and key terms
Is study here free?
Yes. Every course and learning material of Risk Academy, led by the Nexus Consortium, is free to study, self-paced or with a cohort. Ordinary participation has no fee; paid work, internships and fellowships are separate arrangements.
What does completing a course give me?
A completion record: the course, its version, the date and what was assessed, private by default and shared by you. It stacks into discipline, department and programme achievements. A record states what was studied and assessed and does not certify competence; it is not a licence, a professional title or an employment status.
Where do the data and the places come from?
Every faculty teaches on a twin of a real place built from open data; each layer carries its provider, licence and date, and every result on the Academy states its source. Maps and figures are indicators for teaching, never an assessment of a place.
How do I take part beyond the courses in earthquakes, volcanoes, tsunamis and landslides?
Form a competence cell of three to seven people, study a shared pathway, take a supervised assignment in the National Working Groups, or bring a cohort from your institution. For organisations.
Key terms
Term
Magnitude and intensity
Magnitude measures the size of an earthquake at its source, related to the energy it releases; intensity describes the shaking and damage at a place.
Term
Peak ground acceleration
The largest ground acceleration recorded or expected at a site during shaking.
Term
Probabilistic seismic hazard analysis
A method that combines all possible earthquakes to estimate the probability of exceeding a shaking level.
Term
Tsunami travel time
The time a tsunami takes to reach a coast from its source, which sets the warning window.
ReportsContribute
Contribute evidence from this page.
Reports is the Consortium's quarterly publication. What you know about this subject can become evidence, a case or a correction in the next edition, credited to you and published under CC BY 4.0 where it is your own work.
Risk Academy
Related
Around Earthquakes, volcanoes, tsunamis and landslides
Earthquakes, volcanoes, tsunamis and landslides
Prepare with a related course
Open courses in connected disciplines teach the methods this discipline will build on.