共和7.0级地震前地震活动特征

本文从背景性地震活动、地震活动的时空分布以及前兆震群活动等基本特征出发，分析了共和地震前地震活动的异常特征。结果说明，共和地震是发生在青藏高原北部地震区地震活动增强的背景中。震前２０年存在着中强地震空区。震前２－３年几乎同步出现了多种测震学异常。但无短临信息的前震活动。     

频率域电磁测深中的记录规则

首先讨论了频率域电磁测深中的记录规则,然后利用三维数值模拟结果作了具体分析。认为,在不考虑微弱的阴影效应时,将测深点作为频测记录点更为合理。野外试验对比说明了同样的结论。     

航空甚低频电磁异常在胶东牟乳地区构造填图中的应用

通过对胶东牟平－乳山地区１：２．５万航空甚低频电磁异常的分析研究，并结合航磁，航放、遥感以及区域构造地质资料，进行了构造地质填图，首次进一步证实了被前人所忽视的近东西向断裂构造的存在，并给予了准确定位。在此基础上进行了金矿成矿远景预测，取得了比较满意的效果。     

1994年2月16日共和5.8级地震短临预报实况

本文真实地再了１９９４年２月１６日青海共和５．８级地震前前兆异常的发展过程及对该地震的短临预报过程，同时系统地分析了前兆异常在时间，空间及种数上的分布特征。指出，在有一定前兆监测能力的地区，对一些较大地震作出一定的或成功的短临预报是有希望的。     

Electromagnetic radiation anomalies before moderate and strong earthquakes

Ｅｌｅｃｔｒｏｍａｇｎｅｔｉｃｒａｄｉａｔｉｏｎａｎｏｍａｌｉｅｓｂｅｆｏｒｅｍｏｄｅｒａｔｅａｎｄｓｔｒｏｎｇｅａｒｔｈｑｕａｋｅｓ关华平，刘桂萍Ｈｕａ－ＰｉｎｇＧＵＡＮａｎｄＧｕｉ－ＰｉｎｇＬＩＵ（ＣｅｎｔｅｒｆｏｒＡｎａｌｙｓｉｓａｎｄＰｒｅｄ...     

Research on earthquake prediction from geomagnetic pulsation

Ｒｅｓｅａｒｃｈｏｎｅａｒｔｈｑｕａｋｅｐｒｅｄｉｃｔｉｏｎｆｒｏｍｇｅｏｍａｇｎｅｔｉｃｐｕｌｓａｔｉｏｎ周军成，韩克礼，王培德，鲁跃Ｊｕｎ－ＣｈｅｎｇＺＨＯＵ；Ｋｅ－ＬｉＨＡＮ；Ｐｅｉ－ＤｅＷＡＮＧａｎｄＹｕｅＬＵ（ＩｎｓｔｉｔｕｔｅｏｆＧｅｏｐ...     

Study on electric variations of media in epicentral area by geomagnetic transfer functions

ＳｔｕｄｙｏｎｅｌｅｃｔｒｉｃｖａｒｉａｔｉｏｎｓｏｆｍｅｄｉａｉｎｅｐｉｃｅｎｔｒａｌａｒｅａｂｙｇｅｏｍａｇｎｅｔｉｃｒａｎｓｆｅｒｆｕｎｃｔｉｏｎｓＸｉａｏ－ＰｉｎｇＺＥＮＧ；（曾小苹）Ｙｕｎ－ＦａｎｇＬＩＮＩ；（林云芳）Ｚｈｏｎｇ－ＪｉｅＺＨ...     

天水地区大地电磁测量及深部电性结构

天水地区的大地电磁测量结果表明，在４３ｋｍ左右的深度上普遍存在高导层，这可能是壳幔过渡带的反映。岩石圈厚度大约９５－１１０ｋｍ。在天水太京附近可能存在一条大型近东西向地壳－岩石圈构造带，在秦安以北的叶堡和陇城附近可能也存在一条近南北向的大型地壳－岩石圈构造带，它们都是不同构造单元的分界线。１６５４年天水８级大震可能与深部热异常引起的热应力有关。     

频率测深波区视电阻率响应和正演计算

本文对频率测深电偶源发射时的波区视电阻率响应进行了较系统的讨论,指出了国内现有理论中的一些错误。研究发现,在进行波区视电阻率响应的理论推导时,当基底电阻率有限时进行零级近似是正确的,但当基底电阻率为无限大时,进行零级近似是不完善的,必须进行修改。利用正确的公式进行了视电阻率响应的正演计算,结果表明,利用零级近似得出的公式与利用一级近似得出的公式计算的视电阻率响应曲线首支部分符合较好,但对于有高阻基底存在的地电断面,响应曲线尾支差异很大。     

Lightning optical pulse statistics from storm overflights during the Altus Cumulus Electrification Study

The Altus Cumulus Electrification Study (ACES) was conducted during the month of August 2002 in an area near Key West, Florida. One of the goals of this uninhabited aerial vehicle (UAV) study was to collect time resolved optical pulse data from thunderstorms. During the month long campaign, we acquired 5256 lightning generated optical pulses. Most of these observations were made while quite close to the top of the storms. We divided our data into two amplitude groups based on prior NASA U2 aircraft optical data and the pulse characteristics. The group of strong pulses with radiance greater than 2.1 mW m^{− 2} sr^{− 1} had mean and median 10–10% optical pulse widths of 770 and 740 μs, respectively, 50–50% pulse widths of 399 and 355 μs, respectively, and 10–90% risetimes of 292 and 260 μs. These values are very similar to the previous U2 based optical results The other group of pulses consisting of slightly more than a quarter of the total pulses observed had radiances less than the minimum values detected in the U2 study. These weak pulses were narrower than the strong pulses with 50–50% mean and median values of 199 and 160 μs, respectively. Only 12% of the flashes observed contained only weak pulses. The source of these weak pulses is unknown, but we suspect that some are artifacts of the close proximity of the aircraft to cloud top.