The new medal understands the efforts in order to practical geophysics as well as unselfish collaboration inside the lookup

The new medal understands the efforts in order to practical geophysics as well as unselfish collaboration inside the lookup

Keiiti Aki

Keiiti Aki try provided new 2004 William Bowie Medal during the AGU Slip Conference Remembers Ceremony, which was stored on the , in Bay area, Ca.


Kei Akis medical research has longer brand new frontiers out of seismology to have half a century. The guy developed the fresh new digital processing off seismic analysis so you’re able to infer Earth construction and features of earthquake source. Much of whatever you find out about high earthquakes comes after out of their performs.

He was the first ever to level seismic second (on 1964 Niigata disturbance); Aki moment features while the replaced Richter magnitude given that standard scale out of quake size. The guy located the fundamental scaling laws and regulations getting seismic spectra one resolved inconsistencies one of different magnitude bills, in which he proposed actual type earthquakes to own heterogeneous fault rupture. It really works shared notably to the earliest understanding of brand new rupture process additionally the important comprehension of good ground motions.

He elucidated the fresh sprinkling and you may attenuation processes one to control this new propagation out of highest-volume seismic surf, from which he derived new tricks for computing earthquake size, sprinkling distributions, and you may intrinsic attenuation details. He shown, such as, that inherent attenuation need drop off at the higher wavelengths.

The guy install of several unique techniques for describing aspects of seismic surf, plus totally free-oscillation breaking, Gaussian beams, and you can border integrated procedures. Inside each situation, he along with his students efficiently utilized these solutions to extract the newest kind of information away from seismograms.

The guy developed travelling-date tomography as a means to examine lithospheric design below dense seismic arrays, posting seminal paperwork nearly ten years just before the widespread app to help you globally seismology. The guy oriented the fresh seismological point of views with the eruptive process, for instance the dating away from seismicity and harmonic tremor to help you magma injections and eruption. He detected blame-area guided swells and you may used its propagation qualities to help you constrain this new width and flexibility of one’s damage areas to flaws.

Due to the fact unbelievable as this abbreviated listing might sound (more information could easily be additional), they doesn’t promote Keis genuine perception in the geoscience neighborhood. The guy literally authored the publication Quantitative Seismology, the essential influential book and you can resource instructions on the reputation for industry, he coauthored having Paul Richards in the 1980.

Just like the an instructor and coach, the guy entrained of several bright youngsters in his trip to understand new active Earth, producing more 50 Ph.D.s which now invade trick positions from inside the seismology international. His victory inside powering more youthful boffins stems partly regarding the breadth of their understanding, as well as of their outstanding personal qualities-attraction, wit, and you can a deep admiration towards the equilibrium and you will poetry of your own natural world.

Keis silent leaders when you look at the seismology keeps presented brand new refinement and you can stamina from unselfish collaboration into the browse. They have stored of numerous ranks: chairman of one’s Seismology Section of AGU, chairman of the Seismological Community out-of The united states, couch of NAS Committee into the Seismology.

But his better leadership conclusion was producing new Southern California Quake Center for the 1991. As its beginning movie director, Kei articulated an eyesight for SCEC the spot where the evaluation from the disciplinary doing work communities was woven along with her into the a system-level ‘learn model to own disturbance risk and you may exposure when you look at the South California. The proprietor-design style lead to of a lot improves into the seismic threat research, such as the incorporation of GPS investigation on a lot of time-label earthquake anticipating, and it also will continue to guide this new broadening SCEC collaboration.

Particular boffins loom so highest within their fields we need individual of your own chatiw sign in William Bowie Medal, is the most all of our beasts.


William Bowie, immediately following just who the Bowie medal is known as, is actually disturb from the in search of regarding seismologists in early 1920s one earthquakes is generally going on on depths off nearly 1,000 kilometer, once the he had been located in a harmonious world of isostasy, in which the Earths indoor is during hydrostatic balance beneath the 100-kilometres thick crust.