Dr. phil. Günther von Büren

Ohne Zusammenfassung     

Commentary on “Earthquake Depths in the Crimea–Black Sea Region” by V.E. Kulchitsky,B.G. Pustovitenko and V.A. Svidlova

It is well known that the results of determining earthquake parameters depend to a large extent on data processing algorithms and velocity models of the seismic wave propagation medium used in solving hypocenter problems. In 1992, V.Yu. Burmin developed a hypocentric algorithm that minimizes the functional of distances between the points corresponding to the theoretical and observed travel times of seismic waves from an earthquake source to recording stations. The determination of the coordinates of earthquake hypocenters in this case is much more stable than for the commonly used minimization of the functional of discrepancies in the seismic wave arrival times at a station. Using this algorithm and the refined velocity model of the medium, V.Yu. Burmin and L.A. Shumlyanskaya reinterpreted the earthquake parameters for the Crimea–Black Sea region. The most important result of this reinterpretation was the conclusion about the occurrence of deep earthquakes with a source depth of more than 60 km in the region. This result contradicts the conventional beliefs about the seismicity of the region and therefore aroused strong criticism from experts directly involved in compiling the existing catalogs of regional earthquakes. These comments and criticisms are presented by V.E. Kulchitsky with coauthors in a work published in this issue of the journal. In the present paper, we analyze the comments in detail and respond. In particular, we show that the previously used methods of seismic data processing made it highly unlikely by default that deep earthquakes would appear in the results. As an example, we refer to the use of travel-time curves for depths down to 35 km. It is clear that deep earthquakes could not have been found with this approach.     

G.S.I—等磁力仪故障的维修方法

G.S.I—等磁力仪是日本进口的用来精密测量地磁偏角D和倾角I的测磁仪器。放大器的输出端接上一个压电晶体耳机用来监测信号。由于某些原因造成晶体性能变差或损坏,观测时声小或无声,而本耳机为专用无磁性耳机,原机无备件,市场上难于购买,一旦损坏观测就得被迫停止。耳机的好坏可用万用表作简单的检查,从仪器上拔下耳机插头,用500型万用表×10KΩ档测量阻值应在1MΩ以上;表针一点不动可能是连接线断或插头和耳机有脱焊;如果阻值偏     

Deep Structure of the Swiss Alps,Results of NRP 20. Edited by O. A. Pfiffner,P. Lehner,P Heitzmann,St. Müller and A. Steck,Birkhauser Verlag,Basel 1997, 380pp.

Studia Geophysica et Geodaetica -     

In memory of G.P. Kalinin (1916–1975)

Chronicles

In memory of G.P. Kalinin (1916–1975)     

Comment on the paper “CAWSES November 7–8, 2004, Superstorm: Complex Solar and Interplanetary Features in the Post-Solar Maximum Phase,” B. T. Tsurutani,E. Echer,F. L. Guarnieri,and J. U. Kozyra,Geophys. Res. Lett. 35 (2008)

The solar sources of the magnetic storms of November 8 and 10, 2004, are analyzed. The preliminary results of such an analysis [Yermolaev et al., 2005] are critically compared with the results of the paper [Tsurutani et al., 2008], where solar flares were put in correspondence with these magnetic storms. The method for determining solar sources that cause powerful magnetospheric storms is analyzed. It has been indicated that an optimal approach consists in considering coronal mass ejections (CMEs) as storm sources and accompanying flares as additional information about the location of CME origination.     

Comment on the paper “The Relationship between Multifractal and Entropy Properties of Seismic Noise in Kamchatka and Irregularity of the Earth’s Rotation” by A.A. Lyubushin,G.N. Kopylova,and Yu.K. Serafimova

Izvestiya, Physics of the Solid Earth - Abstract—In my comment on the paper by A.A. Lyubushin, G.N. Kopylova, and Yu.K. Serafimova, I focus on the problem of legitimacy of seismological data...     

悼念著名湖沼学家Robert G.Wetzel教授

2005年4月18目,美国North arolina大学著名的国际著名湖沼学、淡水生态学家Robert G.Wetzel教授因患肺癌在家中去世,终年68岁．消息传来,正值我们的湖泊富营养化国际会议召开之际,更加令人怀念．因为,本次国际会议就是在他的关心和支持下召开的,他本人还担任本次国际会议的科学委员会的外方主席．当在去年12月收到他的最后一封电子邮件,说明他已经身患绝症而不能来南京参加会议并表示歉意时,