Welcome to the GEOMAGIA50.v3 database


25.01.2017 - Maxwell Brown will present some future updates to GEOMAGIA50 at the 2017 MagIC Workshop at UCSD.

GEOMAGIA50 is an international collaboration to provide easy access to published archeomagnetic/volcanic and sediment paleomagnetic and chronological data for the past 50 ka. It has been funded by the National Science Foundation (NSF) and German Research Foundation (DFG) SPP 1488 and is supported by the following institutions:

GFZ Potsdam, University of California San Diego, University of Freiburg, University of Liverpool and the University of Helsinki.

This web interface allows users to search the database by data type using chronological and geographical constraints.

Please check the log webpage for corrections and updates to the database. Last update: 21st July 2015. If you spot any errors in the database please contact Maxwell Brown (University of Iceland). We appreciate any user feedback on the database.

If you use this database please cite it. Two papers describing the functionality of GEOMAGIA50.v3 have now been published in Earth Planets Space. For queries made from 2015 onwards using the archeo/volcanic database please cite: For the sediment database please cite: For queries made prior to 2015 please cite:
Archeomagnetic and Volcanic Database
At present, the archeomagetic and volcanic database contains over 9000 entries of geomagnetic field directions and intensities.

The GEOMAGIA50 archeomagnetic/volcanic interface allows:
  • selecting and downloading archeomagnetic/volcanic data using various constraints.
  • calculating ARCH3k.1, CALS3k.4, CALS10k.1b, SED3k.1 and pfm9k.1a geomagnetic field model outputs for any location with the option to download the model output as text files. Descriptions of the models can be found here.
  • plotting data and models in time.
  • visualizing data using Google Earth.
Sediment Database
The sediment database currently contains approximately 45,000 individual (specimen/stratigraphic) level data entries from 52 locations, 5000 processed (averaged/smoothed) data entries from 19 locations, 450 radiocarbon ages from 38 locations and 640 general age data from 8 locations. More data will be added with time, so please revisit the database.

The GEOMAGIA50 sediment interface allows:
  • selecting, downloading and online viewing of sediment data using temporal and geographic constraints.
  • calculating and downloading SED3k.1, ARCH3k.1, CALS3k.4, CALS10k.1b and pfm9k.1a geomagnetic field model outputs based on the above constraints. Descriptions of the models can be found here.
If you have comments or suggestions feel free to contact Maxwell Brown (University of Iceland).