Terms of Service

This software and its notification service are provided "as is", without warranty of any kind, either expressed or implied, as to the accuracy, completeness, reliability, usefulness of any information provided.

Conclusions drawn from the data, or actions undertaken on the basis of its contents, are the sole responsibility of the user.

Notifications are not available for all earthquakes (even when the event parameters are available within the app) and they are delayed. There is no guarantee that a notification will actually be delivered. Also, your device may not be able to receive push notifications all the time.



When in use, the application can send your approximate location to the backend servers (a random error of ±500m is introduced before the location leaves the device). These location data are processed only to provide you with relevant information (for example: earthquakes near you or the approximate locations where a seismic event was felt, etc). The location data are never shared with anyone.


The author reserves the right to discontinue any or all of the functionalities of this mobile app or to modify these Terms of Use at any time and with no prior warning.

Data Sources

Credit belongs to all involved institutions. Source and/or reporting agency is always shown for each event.

Earthquakes data sources:

  • BGS - British Geological Survey (UK)
  • CEDC - China Earthquake Datacenter (CN)
  • CEIC - China Seismological Network Center (CN)
  • CSN - Centro Sismológico Nacional, Universidad de Chile (CL)
  • CNS - Centro Nacional de Sismología, Universidad Autónoma de Santo Domingo (UASD)
  • EMSC - European-Mediterranean Seismological Centre
  • GEOFON - GFZ German Research Center for Geosciences (DE)
  • GEONET - GNS Science (NZ)
  • GEOSCIENCE - Geoscience Australia (AU)
  • ICGC - Institut Cartogràfic i Geològic de Catalunya (CAT)
  • IGEPN - Instituto Geofísico Escuela Politécnica Nacional (EC)
  • IGN - National Geographic Institute (ES)
  • IGP - Instituto Geofísico del Perú (PE)
  • KRDAE - Boğazi̇çi̇ Üni̇versi̇tesi̇ Kandi̇lli̇ Rasathanesi̇ ve Deprem Araştirma Ensti̇tüsü (TR)
  • AFAD - Disaster and Emergency Management Authority (TR)
  • SNSN - Svenska nationella seismiska nätet, Uppsala Universitet (SE)
  • SGC - Servicio Geológico Colombiano (CO)
  • CIVISA - Azores Seismovolcanic Information and Surveillance Center (PT)
  • PHIVOLCS - Philippine Institute of Volcanology and Seismology (PH)
  • RSPR - Red Sísmica de Puerto Rico (PR)
  • IMO - Icelandic Meteorological office (IS)
  • INETER - Instituto Nicaragüense de Estudios Territoriales (NI)
  • INGV - Istituto Nazionale di Geofisica e Vulcanologia (IT)
  • IRIS - Incorporated Research Institutions for Seismology
  • ISC - International Seismological Centre
  • NRCAN - Natural Resources Canada (CA)
  • NSC - National Seismological Center (NP)
  • SED - Swiss Seismological Service (CH)
  • SSN - Servicio Sismológico Nacional (MX)
  • UOA - University of Athens (GR)
  • BMKG - Meteorological, Climatological and Geophysical Agency (ID)
  • GII - The Geophisical Institute of Israel (IL)
  • USP - Centro de Sismologia (BR)
  • USGS - United States Geological Survey (US)
  • KNMI - Koninklijk Nederlands Meteorologisch Instituut
  • RéNaSS - Réseau National de Surveillance Sismique
  • FUNVISIS - Fundación Venezolana de Investigaciones Sismológicas (VE)
  • IGEO - Institute of GeoSciences (AL)
  • INPRES - Instituto Nacional de Prevencion Sismica (AR)
  • KMA - Korea Meteorological Administration (KR)
  • ZAMG - Zentralanstalt für Meteorologie und Geodynamik (AT)
  • KNDC - Kazakhstan National Data Center (KZ)
  • TMD - Meteorological Department of Thailand (TH)
  • IPMA - Instituto Português do Mar e da Atmosfera (PT)
  • JMA - Japan Meteorological Agency (JP)

Tsunami bulletins data sources

  • NOAA's National Weather Service

National Tsunami Warning Center
Pacific Tsunami Warning Center

Plate tectonics

  • USGS - United States Geological Survey (US)
  • Orogens are from the World tectonic plates and boundaries dataset -
data source and credits: Hugo Ahlenius, Nordpil and Peter Bird

Population data

  • Center for International Earth Science Information Network - CIESIN - Columbia University. 2016. Gridded Population of the World, Version 4 (GPWv4): Population Density Adjusted to Match 2015 Revision UN WPP Country Totals. Palisades, NY: NASA Socioeconomic Data and Applications Center (SEDAC).

Population Density map tiles layer are from Gridded Population of the World, Version 4 (GPWv4) - UN-Adjusted Population Density, v4 (2015)

Population Estimation Service is based on data from Gridded Population of the World version 4 (GPWv4) dataset


  • Smithsonian Institution - Global Volcanism Program, 2022. [Database] Volcanoes of the World (v. 5.0.0; 1 Nov 2022). Distributed by Smithsonian Institution, compiled by Venzke, E.

Nuclear power plants

  • GeoNuclearData - The GeoNuclearData database is made available under the Open Database License whose full text can be found at Any rights in individual contents of the database are licensed under the Database Contents License whose full text can be found at

Felt Map Overlay (automatically created)

Felt maps are automatically generated by observing app usage in the following 180 seconds after an event.

When an earthquake is felt, people rush using the app and cause a traffic peak from nearby locations: approximate users' locations, blurred to within 500 meters of their smartphone's actual location, are processed on our servers to generate the heatmap of areas where the earthquake has probably been felt.

When in use, the application can send your approximate location to the backend servers (a random error of ±500m is introduced before the location leaves the device). There is nothing in the heatmaps that can be tied to an individual user and a user's anonymity is never compromised.

The location data are never shared with anyone and never used for other purposes.


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