Global Seismological Services

Global Seismological Services (GSS) is a private consulting company based in Golden, Colorado, United States, specializing in high-resolution and calibrated earthquake location. Founded in 1996 by Dr. Eric A. Bergman, the firm provides specialized seismological analysis, software, and data products to clients worldwide. Its core offering is mloc, a program for the calibrated relocation of clusters of earthquakes, distributed with source code, supporting files, documentation, and training. GSS also produces GCCEL, a global catalog of calibrated earthquake locations determined with mloc. The company offers data analysis services using mloc, with negotiable fees that may be waived for projects of particular interest or for graduate students and recent PhDs. GSS maintains a global focus, with recent earthquake cluster uploads from locations such as Nias, Umluj (Saudi Arabia), Oriente (Cuba), Sumbing (Indonesia), and Paria (Venezuela). As a small, owner-operated consultancy, GSS occupies a niche role in the seismological community, providing tools and expertise for precise earthquake relocation that support research and hazard assessment.

Global Seismological Services (GSS) was established in 1996 by Dr. Eric A. Bergman as a private consulting company focused on high-resolution and calibrated earthquake location. Bergman, a geophysicist with a Ph.D. from the Massachusetts Institute of Technology (1984), brought extensive research experience from MIT, the U.S. Geological Survey (USGS), and the University of Colorado at Boulder, where he was a Research Associate at the Center for Imaging the Earth's Interior from 2000 to 2015. Under his ownership, GSS developed mloc, a software program for the calibrated relocation of earthquake clusters, and later compiled GCCEL, a global catalog of calibrated earthquake locations determined with mloc. The company has provided data analysis services to a global clientele, often on a flexible fee basis, and has supported graduate students and early-career researchers through pro bono work. GSS continues to operate from Golden, Colorado, regularly uploading new earthquake cluster data from regions around the world, including recent clusters in Nias, Umluj (Saudi Arabia), Oriente (Cuba), Sumbing (Indonesia), and Paria (Venezuela).

• 2026

  GSS uploaded or updated earthquake clusters for Nias, Umluj (Saudi Arabia), Oriente (Cuba), Sumbing (Indonesia), and Paria (Venezuela).

• 2000

  Eric Bergman began a concurrent role as Research Associate at the Center for Imaging the Earth's Interior, University of Colorado at Boulder, lasting until 2015.

• 1996

  Global Seismological Services was established by Dr. Eric A. Bergman.

Specialized, high-resolution calibrated earthquake location for research and applied seismology.

• mloc

  A program for calibrated relocation of clusters of earthquakes, distributed with source code, supporting files, documentation, and training.

• GCCEL

  A global catalog of calibrated earthquake locations determined with mloc.

1. 1Global Seismological Servicesseismo.com
2. 2Services – Global Seismological Servicesseismo.com
3. 3Eric Bergman Biography – Global Seismological Servicesseismo.com
4. 4Global Seismological Services (United States) - Wikidatawikidata.org