studying crustal and upper mantel structures has been limited in the iranian plateau and there has been little work done in this field. in this paper we have a primary motive to map pn and sn velocities beneath most of the iranian plateau in order to test 3-d mantle models and to develop and test a method to produce pn and sn travel time correction surfaces that are the 3-d analogue of travel t...

The efficient computation of finite-frequency traveltime and amplitude sensitivity kernels for velocity and attenuation perturbations in global seismic tomography poses problems both of numerical precision and of validity of the paraxial approximation used. We investigate these aspects, using a local model parameterization in the form of a tetrahedral grid with linear interpolation in between g...

The analysis of surface latent heat flux (SLHF) from the epicentral regions of five recent earthquakes that occurred in close proximity to the oceans has been found to show anomalous behavior. The maximum increase of SLHF is found 2–7 days prior to the main earthquake event. This increase is likely due to an ocean-land-atmosphere interaction. The increase of SLHF prior to the main earthquake ev...

In the previous paper, we carried out literature survey on damage in Osaka plain due to 1927 Kita-Tango earthquake and clarified that severe casualty were reported spite of its long epicentral distance more than 100km. Nine years after, this area was hit by 1936 Kawachi-Yamato occurred at border Nara prefectures. paper out. Earthquake including revealed building casualties is described based pu...

This study proposes an earthquake early warning (EEW) method for ocean bottom seismic (OBS) data systems of railways. Because the conventional Shinkansen adopts only S-wave alarm OBS data, we demonstrate that P-wave can estimate epicentral distance and magnitude using but cannot accurately determine back azimuth. Considering this, propose a concrete how to judge whether is issued applying data....

Literature survey on damage in Osaka Plain due to the 1927 Kita-Tango earthquake is carried out. This was M=7.3 inland event and caused severe epicentral region of Tango peninsular, Kyoto prefecture. In plain this including casualties spite its long distance more than 100km. However, many concerns have been concentrated along appeared surface faults that has forgotten for time. paper, discussed...

the artificial accelerograms have been developed for assessing the dynamic response ofstructures. considering seismological properties of the site are necessary for the best simulation ofaccelerograms. the real recorded accelergrams for simulating earthquake phenomenon are used in thearma model. this is due to the fact that the arma model can be considered more advantageous than theothers.in th...

Prior to the 2018 landing of InSight mission, science team proposed locating Marsquakes using multiple orbit surface waves, independent seismic velocity models, for events larger than MW4.6. The S1222a MW4.7 4 May 2022 is largest Marsquake recorded and first large enough this method. Group arrivals three orbits Rayleigh waves are determined derive group velocity, epicentral distance, origin tim...