GLOBALSEIS - Research pages

Download a PDF version of the Mermaid presentation at AGU, or go to the Mermaid pages for the latest news on this revolutionary new seismograph that opens up the oceans for seismometry!

Geoazur and Princeton celebrated Guust Nolet's career. Click here for some photos and to read his views on the future of the geosciences and what that means for the way we educate students.

The ERC project has come to an end....

Though the ERC project ended definitely in January 2015, and its PI now has emeritus status, he continues to work with former postdocs on many of the topics of interest, and especially with Yann Hello on further development of the Mermaids - the underwater robots that are the most spectacular succes of the Globalseis project.

The Galapagos project

The last of the Mermaids active near the Galapagos islands (in an effort to image the deeper segment of the mantle plume) has now run out of battery power. It transmitted data until October 2016. We are currently analyzing hundreds of seismograms. The figure gives the path coverage of the data analyzed so far (path coverage is a technical term indicating how the mantle plume is illuminated by seismic rays, which will allow is to compute an image of its temperature anomaly).

Global tomography

With Dylan Mikesell we have inverted more than three million Rayleigh wave phase data. We estimated standard errors objectively using the method we developed with Sergey Voronin (Voronin et al., 2014) and were able to ascertain that we need to include both azimuthal anisotropy as well as Love-Rayleigh mode coupling to fit the data to their accuracy. Click here to obtain a PDF copy of the poster we presented at the EGU Assembly in April 2016 in Vienna.