It is wise for researchers to take advantage of open data. Sometimes it can be crucial. Some of the greatest open access geo-databases are as follows.
Seafloor Bathymetry
Global high resolution
GMRT
JAMSTEC - Data and Sample Research System for Whole Cruise Information - Remember to choose “Bathymetry (MBES)” before searching!
NOAA Bathymetry
Regional high resolution
IHO Data Centre for Digital Bathymetry
NOAA - Altimetric Bathymetry
Baltic Sea Bathymetry Database
AusSeabed Bathymetry and Backscatter Data, Australia
General Bathymetric Chart of the Oceans - 15 arc seconds
GEBCO 2019 Gridded Bathymetry Data
GEBCO - Undersea Feature Names Gazetteer
Seismology
Earthquake Catalog
Bulletin of the ISC
IRIS Event Plot Product Query
USGS Earthquake Catalog
AusPass, Australia
Data Centers Supporting FDSN Web Services
ISC Station Search
FDSN Network Codes
Focal Mechanism
Global CMT
ISC Bulletin - Focal mechanism
NIED F-net Earthquake Mechanism Information
Istituto Nazionale Di Geofisica E Vulcanologia - Time Domain Moment Tensor Catalogue, Italy
BATS CMT Catalog Search, Taiwan
Earth Model
CRUST 1.0: Global Crustal Model at 1x1 Degrees
IRIS Earth Model Collaboration
ICGEM - Gravity Field Models
Gravity
Marine Gravity Map
Geomagnetism
The Global Seafloor Fabric and Magnetic Lineation Data Base Project
Geomagnetic and Electric Field Models
Heat Flow
Global Heat Flow Database
Volcano
Volcano Location Database Search