magnitude determination
2.THE MOMENT MAGNITUOE SCALE(Mw)TO BE COMMONLY USED SOON OVERVIEW OF MAGNITUDE DETERMINATION OF DISTANT EARTHOUAKES
3.This paper presents an overview of the magnitude determination of the November 14, 2001 earthquake west of Kunlun Mountain Pass (KMP) at the juncture of Xinjiang and Qinghai, northwestern China. Comparisons are made among surface wave magnitudes determined by China National Digital Seismograph Network (CNDSN), National Earthquake Information Center (NEIC) of US Geological Survey (USGS) and moment magnitudes determined by different institutions in China and abroad.
4.Some experimental astfometric plates were taken with the 1.56m telescope of Shanghai Observatory during 1988-1989. Based on these plates, some properties of the telescope, such as imaging, magnitude limits, the focus length, and the position precision, are discussed. The gnomonic projection technique, developped by Murray, is applied to determination of the focal length of the telescope.
