Membership of the ISC is open to any national academy, agency, scientific institution or other non-profit organisation. Any commercial organisation with an interest in the objectives and/or output of the Centre may become an Associate Member. Each member of the ISC is represented on the Governing Council, which is the ruling body of the ISC.
| Alaska Earthquake Center (AEC), University of Alaska Fairbanks, U.S.A. |
| AWE Blacknest, United Kingdom |
| Belgian Science Policy Office (BELSPO), Belgium |
| Center for Earthquake Research and Information (CERI), the University of Memphis, U.S.A. |
| Centre de Recherche en Astronomie, Astrophysique et Géophysique (CRAAG), Algeria |
| Centre of Geophysical Monitoring (CGM) of the National Academy of Sciences of Belarus |
| Centro de Investigación Científica y de Educación Superior de Ensenada (CICESE), Mexico |
| Centro Sismologico Nacional, Universidad de Chile |
| Dublin Institute for Advanced Studies, Ireland |
| Earth Observatory of Singapore (EOS), an autonomous Institute of Nanyang Technological University, Singapore |
| Environmental Agency of Slovenia |
| Geological Survey Department, Cyprus |
| Geological Survey of Israel |
| Geophysics, Research School of Earth Sciences, Australian National University, Australia |
| Institut Cartogràfic i Geològic de Catalunya (ICGC), Spain |
| Institute of Earth Physics and Space Science (EPSS), Hungarian Research Network (ELKH), Hungary |
| Institute of Earth Sciences, Academia Sinica, Chinese Taipei |
| Institute of Geophysics, Czech Academy of Sciences, Czech Republic |
| Institute of Geophysics, National University of Mexico |
| Institute of Geophysics, Polish Academy of Sciences, Poland |
| Institute of Geosciences, Polytechnic University of Tirana, Albania |
| Institute of Marine Sciences (ICM-CSIC), Spain |
| Institute of Radiological and Nuclear Safety (IRSN), joint authority of the Ministries of Defense, the Environment, Industry, Research, and Health, France |
| Iraqi Meteorological Organization and Seismology, Iraq |
| Istituto Nazionale di Oceanografia e di Geofisica Sperimentale, Italy |
| Kandilli Observatory and Earthquake Research Institute, Turkey |
| Korean Meterological Administration, Republic of Korea |
| Lamont-Doherty Earth Observatory, Columbia Climate School, Columbia University, U.S.A. |
| Mavlyanov Institute of Seismology, Academy of Sciences, Republic of Uzbekistan |
| National Defence Research Establishment (FOI), Sweden |
| National Institute for Earth Physics, Romania |
| National Institute of Geophysics, Geodesy and Geography (NIGGG), Bulgarian Academy of Sciences, Bulgaria |
| National Institute of Polar Research (NIPR), Japan |
| National Research Institute for Astronomy and Geophysics (NRIAG), Cairo, Egypt |
| Observatorio Nacional, Brazil |
| Pacific Northwest Seismic Network (PNSN), U.S.A. |
| Red Sísmica de Puerto Rico |
| Seismological Observatory, Institute of Geosciences, University of Brasilia, Brazil |
| Soreq Nuclear Research Centre (SNRC), Israel |
| Texas Seismological Network (TexNet), Bureau of Economic Geology, J.A. and K.G. Jackson School of Geosciences, University of Texas at Austin, U.S.A. |
| The Icelandic Meteorological Office, Iceland |
| The Seismological Institute, National Observatory of Athens, Greece |
| Universidade de São Paulo, Centro de Sismologia, Brazil |
| University of the West Indies at Mona, Jamaica |
| University of Utah Seismograph Stations (UUSS), U.S.A. |