A5062461431- earthquake and tectonic studies
- Seismology and Earthquake Studies
- Geological and Geochemical Analysis
- High-pressure geophysics and materials
- Earthquake Detection and Analysis
- Astro and Planetary Science
- Planetary Science and Exploration
- Methane Hydrates and Related Phenomena
- Geochemistry and Geologic Mapping
- Diamond and Carbon-based Materials Research
- Geological formations and processes
- Environmental and Agricultural Sciences
- Earthquake and Disaster Impact Studies
- Geological Modeling and Analysis
- GABA and Rice Research
- Coastal and Marine Dynamics
- Marine and environmental studies
- Radioactive element chemistry and processing
- Remote Sensing and Land Use
- Landslides and related hazards
- Earthquake and Tsunami Effects
Japan Meteorological Agency
2003-2020
Earthquake Engineering Research Institute
2019
Tohoku University
1992-2011
Institute of Mineralogy
1993-1994
Recent enhancement of seismic networks in the Japan Islands revealed occurrence low‐frequency continuous tremors a beltlike distribution southwest Japan, where subducting Philippine Sea plate reaches depths 30–40 km. Source depth tremor is estimated by selecting segments with relatively clear P‐wave onsets. The source region assumed to correspond lowermost parts crust close triple boundary crust, mantle wedge, and slab. long duration phenomenon indicates existence fluid relating generation...
Research Article| June 13, 2018 Development of a Slow Earthquake Database Masayuki Kano; Kano aEarthquake Institute, The University Tokyo, 1‐1‐1 Yayoi, Bunkyo‐ku, Tokyo 113‐0032, Japan, babasatoru@eri.u-tokyo.ac.jp, kano@eri.u-tokyo.ac.jp, obara@eri.u-tokyo.ac.jp, maeda@eri.u-tokyo.ac.jp, akiko-t@eri.u-tokyo.ac.jpqNow at Department Geophysics, Graduate School Science, Tohoku University, 6‐3 Aramaki Aza‐Aoba, Aoba‐ku, Sendai, Miyagi 980‐8578, Japan; masayuki.kano.a3@tohoku.ac.jp. Search for...
Abstract We analyzed long‐term continuous seismic records (from September 2015 to April 2016) of Dense Ocean‐floor Network System for Earthquake and Tsunamis, an ocean‐floor observation system deployed around the fore‐arc slope Nankai subduction zone investigate shallow tremor near trough axis. found that activity was concentrated in two time periods: 6 days October 2 weeks 2016. During episode 2016, migration triggering were observed. These characteristics are similar those deeper part...
Recent high pressure experiments on the model martian mantle provide firm constraints internal structure and chemistry of Mars. We examined models proposed by Morgan Anders (1979) Dreibus Wanke (1985) based mineral physics data obtained recent experiments. Original these authors must be modified to reduce mass fraction core thus bulk iron content Mars in order satisfy geophysical constraints. present a new interior which satisfies cosmochemical Our is composed mixture three components: 15.7%...
Abstract The Japan Meteorological Agency (JMA) is a governmental organization that has responsibilities for mitigation of natural disasters. JMA issues warnings and information about disasters, in addition to daily weather forecasts. When an earthquake occurs, analyzes seismic data issue early warning warn possible tsunamis when tsunami expected strike coastal areas Japan. During effect, monitors meters updates the warning. also provides several types macroseismic information. To fulfill...
In recent years, improved seismic networks in Japan have detected low-frequency events near the Mohorovicic discontinuity, but away from volcanoes. These can be classified as two types: earthquakes (LFE) and tremors (LFT). Source regions for LFE are distributed isolated locations throughout Japan, while those LFT within a belt western Japan. Although immediately below volcanoes been previously recognized, represent new observations. found specifically both back-arc of volcanic front...
The Kumamoto Prefecture suffered an earthquake of M JMA 6.5 on April 14, 2016 at 21:26 (Japan Standard Time). A seismic intensity 7, the Japan Meteorological Agency (JMA) scale, was observed, which, by definition, is maximum possible value. After 18 hours earthquake, issued a prospect for aftershock activity, where probability aftershocks with 6 Lower (6-) or greater, 20% within three days following 16:00 JST 15, 2016. Ten post issuance prospect, 01:25 16, larger 7.3, occurred in same region...
A model of the structure in Martian interior was presented on basis high pressure and temperature experiments homogeneous mantle composition Morgan Anders (1979). The sequence phase assemblages with increasing depth is summarized as follows: olivine+pyroxene+plagioclase (+minor phases) at depths shallower than 230km; olivine+pyroxene+garnet from 230 to 1, 280km; garnet+β-spinel and/or γ-spinel ((Mg, Fe)2, SiO4, )+magnesiowustite transition zone 280 800km;...
The Earthquake and Volcano Hazards Observation Research Program (2014–2018) carried out comprehensive research to mitigate disasters related earthquakes volcanic eruptions. program selected multidisciplinary in which earth scientists who study the processes of earthquake generation eruptions, historians, archaeologists, human social scientists, engineers were all involved. aimed collect pre-instrumental pre-historical data understand volcano disasters, find risk evaluation techniques,...
High pressure studies on planetary materials provide very important contributions for the understanding of internal structure planets, since knowledge properties high phases planet forming gives constraints discussing planets. Here is reviewed planets inferred from research together with geophysical and geochemical observations.