Tags » Geodesy

American Canyon M6.1 Earthquake in CA – data from Nevada Geodetic Laboratory

A message from Bill Hammond at the NBMG Nevada Geodetic Laboratory:

American Canyon M6.1 earthquake in the northern San Francisco Bay area: NBMG researchers have derived rapid earthquake displacement maps from GPS data that illustrate how the earth around the rupture underwent permanent coseismic deformation.  26 more words

Dry Rising Crust

Dry, rising crust? No, not the morning toast coming up.  A paper released today by researchers at Scripps Institution of Oceanography shows that the American southwest, in the grips of a “once-in-a-century” drought, is rising because groundwater which normally keeps the crust weighted down has disappeared. 299 more words

Geophysics

All Aboard the Barracuda

Maurice Ewing was a Texas-panhandle farm boy,  became a geophysicist, and then and oceanographer. He conducted the first marine seismic acquisition, inventing the equipment he needed as he sailed the oceans. 535 more words

History

GENAH 2014 Conference, Japan

A few weeks ago, CGS academic Tim Wright and PhD student Ekbal Hussain attended the Geodesy for Earthquakes and Natural Hazards (GENAH) conference held in Matsushima, Japan. 16 more words

Earthquake

Oblated Spheroids, anyone?

Who cares if the world is not a perfect ball?  You should, for one. Knowing the exact shape of the Earth keeps satellites in place, keeps your GPS navigator working, and keeps you from the dehumanizing torture of asking someone for directions. 564 more words

History

Spacewar!, and Mapping Gravity

The blog War is Boring has a brief shout-out to Spacewar!, the first video game. Programmed by a inventive group of graduate students to run on MIT’s Program Data Processor-1 (PDP-1), … 590 more words

Better know a Canadian functionary: the Dominion Geodesist

Land surveying in Canada falls under the purview of the Surveyor-General of Canada, as I’ve said before. But surveying depends on a lot of basic measurements and calculations of measurements of the Earth to take into account when surveying, things like differing sea levels or regional variances in the Earth’s gravitational pull or its magnetic field. 193 more words