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| 1 | The b-value and fractal dimension of local seismicity around Koyna Dam(India)显示文摘Earthquakes began to occur in Koyna region(India) soon after the filling of Koyna Dam in 1962. In the present study, three datasets 1964–1993, 1993–1995, and1996–1997 are analyzed to study the b-value and fractal dimension. The b-value is calculated using the Gutenberg–Richter relationship and fractal dimension Dcorr.using correlation integral method. The estimated b-value and Dcorr.of this region before 1993 are found to be in good agreement with previously reported studies. In the subsequent years after 1995, the b-value shows an increase. The estimated b-values of this region are found within the limits of global average. Also, the pattern of spatial clustering of earthquakes show increase in clustering and migration along the three zones called North-East Zone, South-East Zone(SEZ), and Warna Seismic Zone. The earthquake events having depth B5 km are largely confined to SEZ.After 1993, the Dcorr.shows decrease, implying that earthquake activity gets clustered. This seismic clustering could be helpful for earthquake forecasting. | Arjun Kumar S.S.Rai Anand Joshi Himanshu Mittal Rajiv Sachdeva Rohtash Kumar Vandana Ghangas | 2013 | Earthquake Science2013，26，2： | 1 |
| 2 | Seismic Imaging of the Upper Mantle under the Erebus Hotspot in Antarctica显示文摘P-wave velocity images are determined under the Mount Erebus hotspot,Antarctica by using teleseismic tomography.Our results show a prominent low-velocity(low-v)anomaly of nearly circular symmetry(about 250-300 km in diameter)to about 200 km depth under the Mount Erebus volcanic region,which further extends down to~400 km as a narrow tilted column.The observed low-v anomaly beneath the Mount Erebus volcano can be an expression of a thermal anomaly of deep origin. | Sandeep Gupta S.S.Rai | 2009 | 地学前缘2009，16，S1： | 1 |
| 3 | 印度喀拉拉邦伊都基水库附近小震的精确定位和震源机制:地震成因的启示显示文摘应用印度南部新建的一个拥有21个台站的临时台阵的地震波形,显著提高了喀拉拉邦伊都基水库附近地区小震的检测阀值和参数。我们给出了这一地区16个地震的精确定位,地方震级为1.5~3.6,震源深度7.2~9.9kin。所选6个最好地震的断层面解显示走滑断层错动兼右旋运动。水库加载通常会导致应力的产生和在浅层深度(〈5km)弓l发地震,但是在伊都基水库区域内却没有该深度的地震。记录到的地震仅限于靠近Karur-Kambam-Painavu-Trichur(KKPT)剪切带西北-东南走向的断层。这些结果表明,伊都基水库区域内的地震均属于天然构造地震,而与水库没有联系。 | utpal saikia s.s.rai m.subrahmanyam satyajit dutta somasish bose kajaljyoti borah rishikesh meena 任家琪(译) 李艳娥(校) | 2016 | 世界地震译丛2016，47，3： | 0 |
| 4 | Formation and Evolution of Dharwar Craton in South India-Synthesis from Broadband Seismological Experiment显示文摘Understanding the structure,composition and survival of Archaean cratons over geological times is critical to model the process of crustal evolution.The South India Broadband Seismic Imaging Experiment was organized to answer fundamental questions of craton formation,with the principal objective of characterizing physico-chemical nature of the crust and mantle of Dharwar craton and adjoining terrains. | Sandeep Gupta S.S.Rai K.S.Prakasam | 2009 | 地学前缘2009，16，S1： | 0 |
| 5 | Crustal Tomography Under the Median Tectonic Line in Southwest Japan Using P and PmP data显示文摘The Median Tectonic Line(MTL)is the largest active fault system on the Japan Islands and underlies many densely populated areas.To understand the seismotectonics and to reduce seismic hazard in the MTL region,we determined a detailed 3-D crustal structure under the region using a large number of arrival times of the first P-waves and Moho-reflected waves(PmP).Results of detailed resolution tests show that the addition of PmP data can significantly improve the resolution of the lower crustal structure and the entire crustal structure can be imaged better than that by using P-wave data alone.The | Sandeep Gupta Dapeng Zhao M.Ikeda S.Ueki S.S.Rai | 2009 | 地学前缘2009，16，S1： | 0 |
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