An innovative multiple isolation building system is proposed, and the influence of hardening in seismic isolators on the response of a multiple isolation building is investigated by shaking table vibration tests for a scaled structural model. From the observation in recent earthquake disasters in far-fault ground motions, e.g., the 2011 off the Pacific coast of Tohoku earthquake, a significant ...

Different forms of fluctuations of the terrestrial gravity field are observed by gravity experiments. For example, atmospheric pressure fluctuations generate a gravity-noise foreground in measurements with super-conducting gravimeters. Gravity changes caused by high-magnitude earthquakes have been detected with the satellite gravity experiment GRACE, and we expect high-frequency terrestrial gra...

During late September 1996, a major eruption took place at the NW part of the VatnajoÈkull glacier in central Iceland. The eruption was preceded by intense seismic activity, which began with a Mw ˆ 5:6 earthquake two days previously. Two very active volcanic systems, BaÂrdarbunga and GrimsvoÈtn, are situated in that area underneath the permanent ice cap. The volcanoseismic phenomena associated ...

The observation of g-mode candidates by the SoHO mission opens the possibility of probing the internal structure of the solar radiative zone (RZ) and the solar core more directly than possible via the use of the p-mode helioseismology data. We study the effect of rotation and RZ magnetic fields on g-mode frequencies. Using a self-consistent static MHD magnetic field model we show that a 1% g-mo...

This paper briefly reviews the development of earthquake resistant design of buildings. The state-of-the-art of seismic design is discussed from the viewpoint of the performance criteria of buildings. These are (a) serviceability from frequent minor-intensity earthquake motions, (b) repairability from an infrequent but major-intensity earthquake motion, and (c) life safety from the maximum poss...

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A new seismic trace interpolation method based on adaptive prediction filters (PF) is introduced. In order to estimate local PFs, the contribution of adjacent windows of data to the process of local PF estimation is reduced via the introduction of a forgetting factor. Using a Recursive Least Square (RLS) algorithm, the problem of estimating PFs for each window of data is avoided and the local P...