The medal comprehends a good contributions to fundamental geophysics and for unselfish collaboration in search

Keiiti Aki

Keiiti Aki is actually awarded the latest 2004 William Bowie Medal in the AGU Slide Appointment Honors Ceremony, that was kept with the , for the San francisco bay area, Ca.


Kei Akis medical research has offered this new frontiers of seismology having 50 years. He developed the fresh digital control out-of seismic studies to infer World structure and you will attributes of the earthquake source. Much of what we realize about large earthquakes pursue out-of their really works.

He was the first to size seismic time (with the 1964 Niigata earthquake); Aki moment have because the replaced Richter magnitude once the basic level out-of quake size. The guy discover the fundamental scaling guidelines to own seismic spectra you to solved inconsistencies certainly one of more magnitude bills, and he proposed actual type earthquakes to possess heterogeneous blame rupture. So it performs shared rather so you’re able to both the first understanding of the newest rupture techniques as well as the simple knowledge of solid crushed motions.

He elucidated brand new scattering and attenuation processes you to govern the new propagation out of higher-volume seismic swells, at which he derived new tricks for computing quake proportions, sprinkling distributions, and you will inherent attenuation details. He showed, by way of example, your intrinsic attenuation need fall off within higher wavelengths.

He arranged of many book tricks for detailing regions of seismic waves, along with totally free-oscillation breaking, Gaussian beams, and you will border integrated measures. When you look at the for each and every case, he and his college students effectively put this type of strategies to extract the fresh new variety of advice away from seismograms.

The guy pioneered traveling-date tomography as an easy way to learn lithospheric construction beneath heavy seismic arrays, publishing seminal papers almost a decade ahead of the prevalent software in order to worldwide seismology. He dependent the latest seismological viewpoints into the eruptive procedure, such as the dating off seismicity and you will harmonic tremor so you’re able to magma injection and emergence. The guy perceived fault-zone guided swells and you may used the propagation features to constrain the latest thickness and you can elasticity of your destroy areas as much as faults.

As the epic because abbreviated list might sound (a great deal more information can easily be extra), they does not display Keis correct perception when you look at the geoscience neighborhood. The guy practically composed the book Quantitative Seismology, probably the most important textbook and you can resource guide about history of industry, he coauthored that have Paul Richards in 1980.

Given that an instructor and you will coach, the guy entrained of a lot brilliant students within his journey knowing new productive Planet, creating over fifty Ph.D.s who now reside key positions when you look at the seismology around the world. His profits inside the powering more youthful boffins stems in part regarding the breadth out of his knowledge, and away from his better private properties-attraction, laughs, and an intense esteem towards balance and poetry of the absolute globe.

Keis hushed leadership in the seismology has actually showed brand new refinement and you will power away from unselfish venture in the look. He’s got stored of several ranks: chairman of your Seismology Section of AGU, chairman of the Seismological People out-of The usa, settee of NAS Committee into Seismology.

But their finest management completion try the creation of the new South Ca Quake Center into the 1991. As the beginning director, Kei articulated a plans to possess SCEC where the analysis by the disciplinary functioning organizations is woven along with her to your a network-height ‘master design to possess earthquake threat and chance inside South California. The dog owner-design concept triggered of many advances in seismic chances investigation, for instance the incorporation off GPS data for the much time-title earthquake forecasting, therefore continues to guide the broadening SCEC collaboration.

Specific boffins loom so high inside their industries that we have to receiver of your own William Bowie Medal, is one of our monsters.


William Bowie, once which the fresh Bowie medal is named, is actually upset from the seeking from seismologists during the early 1920s you to definitely earthquakes could be happening at the deepness off nearly step one,100 kilometres, because he had been staying in a good world of isostasy, where in actuality the Earths indoor is actually hydrostatic harmony below the 100-kilometres thick crust.

Date posted: September 10, 2022 | Author: | No Comments »

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