The fresh medal recognizes outstanding benefits in order to important geophysics and unselfish venture inside the lookup

Keiiti Aki

Keiiti Aki is actually issued new 2004 William Bowie Medal in the AGU Fall Conference Remembers Service, which had been held on the , within the Bay area, California.


Kei Akis medical research has extended the new frontiers out-of seismology having 50 years. He developed brand new electronic operating out of seismic studies to infer World design and you can features of one’s quake source. The majority of that which we learn about large earthquakes pursue away from their work.

He was the first one to size seismic minute (for the 1964 Niigata quake); Aki minute keeps since the changed Richter magnitude while the important scale from quake dimensions. The guy found the essential scaling legislation to possess seismic spectra you to solved inconsistencies certainly different magnitude bills, and then he advised real types of earthquakes for heterogeneous fault rupture. It work provided rather to both earliest comprehension of brand new rupture processes additionally the simple understanding of strong floor moves.

The guy elucidated new sprinkling and you will attenuation processes one to control the new propagation out-of large-volume seismic swells, at which the guy derived the new tips for measuring quake dimensions, scattering withdrawals, and you can inherent attenuation parameters. The guy demonstrated, as an example, the built-in attenuation need certainly to drop-off within large wavelengths.

The guy set up of many unique suggestions for discussing regions of seismic swells, in addition to totally free-oscillation splitting, Gaussian beams, and line built-in measures. Into the for every situation, the guy along with his college students effortlessly utilized such strategies to pull the new sort of information out of seismograms.

The guy developed travel-day tomography as a way to learn lithospheric build beneath dense seismic arrays, publishing seminal records almost a decade ahead of its common application to globally seismology. The guy built the brand new seismological viewpoints towards volcanic processes, including the dating out of seismicity and you may harmonic tremor so you’re able to magma injection and you can eruption. The guy thought fault-region guided waves and put the propagation features to help you constrain this new thickness and you may suppleness of your damage areas doing flaws.

Since impressive since this abbreviated checklist might sound (far more subjects could easily be added), it doesn’t communicate Keis genuine effect inside the geoscience people. The guy literally wrote the ebook Decimal Seismology, the quintessential influential textbook and source guidelines about history of industry, which he coauthored that have Paul Richards inside the 1980.

Because the an instructor and mentor, he entrained of several vibrant children inside the trip knowing the fresh energetic Earth, promoting more than 50 Ph.D.s who today undertake secret ranks in seismology globally. His triumph inside the powering younger boffins stems simply in the depth out-of his wisdom, but also regarding their outstanding personal attributes-attraction, wit, and you will a-deep esteem into balance and you may poetry of the absolute community.

Keis silent frontrunners in the seismology has exhibited the brand new subtlety and you will strength away from unselfish collaboration in the research. They have stored of a lot ranks: president of Seismology Part of AGU, chairman of your own Seismological Society from The united states, couch of the NAS Committee with the Seismology.

But their greatest frontrunners achievement try the production of the fresh Southern California Quake Cardiovascular system inside 1991. As the founding movie director, Kei articulated a vision to own SCEC where the analysis of the disciplinary functioning organizations is woven together with her towards a system-level ‘learn design to have disturbance risk and you may exposure for the Southern area California. The owner-model style led to of a lot improves inside the seismic chances study, such as the incorporation of GPS study on the long-term earthquake forecasting, therefore will continue to guide the fresh expanding SCEC venture.

Certain experts loom thus highest within areas that individuals need individual of William Bowie Medal, is considered the most all of our beasts.


William Bowie, once who the fresh Bowie medal is called, was upset by seeking of seismologists in early 1920s one to earthquakes is generally going on at the deepness from nearly 1,100000 kilometer, because the he had been located in a harmonious realm of isostasy, where in fact the Earths interior is within hydrostatic balance beneath the 100-km thick crust.

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