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Welcome
Scientists at DTM bring the perspective of several disciplines to broad
questions about nature. DTM's name comes from its original role to
chart the Earth's magnetic field. This goal was largely accomplished by
1929. Since then, DTM has evolved to reflect the growing multi-
disciplinary nature of the Earth, planetary, and astronomical sciences.
Today, the historic goal remains-to understand the physical Earth and
the universe that is our home.
The above image is a map tracing the voyages that the Carnegie and the Galilee research vessels undertook, beginning in 1905.
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Friday, 02 May 2008 |
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The second annual Carnegie Neighborhood Lecture Series will be held this spring on the BBR Campus. Presenters include DTM Director Sean Solomon on 25 March, and Ronald Cohen and Andrew Steele of GL on 8 April and 13 May, respectively. All lectures are free and will take place at 6:30 p.m. in the Greenewalt Building Lecture Hall. To view the full invitation, click here. Photos, courtesy DTM Visiting Investigator Sergei Ipatov, can be viewed here.
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Friday, 02 May 2008 |
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Second from Left: Thomas Krogh. DTM/GL Archives.
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Former DTM postdoctoral fellow and GL staff member Thomas E. Krogh passed away on 29 April. During his time at DTM (1964-66) and GL (1966-75), he worked in isotope geochemistry and geochronology and—along with DTM staff members Thomas Aldrich and George Wetherill and several GL colleagues—concentrated on the refinement of techniques for Rb-Sr dating of minerals and rocks and U-Pb dating of zircons and other minerals. Among his many innovations to the field, Krogh developed a new dissolution method for zircons, he was instrumental in making X-ray fluorescence a standard tool for ascertaining the suitability of samples for Rb-Sr analysis, and he helped in improving the production and purification of the 205Pb spike.
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Friday, 25 April 2008 |
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Photo: Stanford University
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Greg Beroza of Stanford University delivered the first Brinson Lecture on Wednesday, 23 April, in the Greenewalt Building Lecture Hall. Beroza’s talk, entitled “Episodic Tremor and Slip: Close Relatives in the Slow Earthquake Family” focused on the presentation of evidence that episodic tremor and slow-seismic-slip earthquakes are both members of a family of unusually slow earthquakes—discovered about 30 years ago from records of DTM strainmeters installed in Japan. Unlike ordinary earthquakes that grow explosively in size with increasing duration, slow earthquakes, whether large or small, grow at a constant rate. Their presence on the deep extension of large faults puts them in a position to trigger large, dangerous earthquakes. According to Beroza, the recent discovery of slow earthquakes and their impact points to the importance of the field of earthquake science for further fundamental discoveries.
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