中国大陆地震活动的广义信息维

给出了广义信息维的计算公式和方法，对中国大陆除青藏高原由于台网太稀，对中小地震无监控能力未作计算之外，对其余震图多的华北，南黄海及其沿岸，川滇、甘青宁、新疆地区都进行了研究，结果表明，在一些主要地震前，在新疆，甘青宁地区的空间信息维高标度值区在强震发之后有明显的降维，而在震前没有，低标度值区在震前都有前兆性降维，而震后恢复。时间分维的前兆性降维比空间分维明显。用许氏Ｒ值进行检验Ｒｓ＝０．３８６，Ｒ

THE GENERAL INFORMATION FRACTAL OF SEISMIC ACTIVITY IN MAINLAND CHINA

This paper presents the computing formula and method of general information fractal and studiesNorth China, Southern Yellow Sea and its cast, Sichuan-Yunnan, Gansu-Qinghai-Ningxia, andXinjiang areas where there are more earthquakes except Qingzang highland where the metworks of stations are quite few and have no observational ability for moderate and small earthquakes, The resultshows that there is a relatively obvious fractal drop process before some main earthquakes;there are certain fractal drop anomalies before some moderately strong earthquakes in North China areal there areobvious fractal drops after strong earthquakes in high scale value areas of spatial information fractal inXinjiang, Gansu-Qinghai -Ningxia regions, but there are no fractal drops before earthquakes, thereare precursory fractal drops before earthquakes in all low scale value areas and they recovered afterearthquakes. The precursory drop of time fractal is more obvious than spatial fractal. When tested byXu's R value, Rs= 0. 386, Rt= 0. 83, all exceeding the marked level.