RESEARCH INFORMATION SERVICE DATA FOR LIST OF SEISMOLOGIC STATIONS Please send information concerning seismologic stations to the Secretary of the American Geophysical Union, Research Information Service, STATION Name Location, with Lat. and Long.. Altitude above sea.... Lithologic foundation.. Date of inauguration__ DIRECTOR Title Name Term of office, if limited... Postal address... SUPPORTING INSTITUTION (university, observatory, or bureau of government) Name __ Title of chief officer. Name... Term of office, if limited Postal address. EQUIPMENT-Seismometers, etc., give types, components, and constants of each TIME-SERVICE-Give equipment, chronographic system employed, and the accuracy obtained. AUXILIARY APPARATUS-Describe briefly, but give sufficient details. A new list of seismological stations throughout the world is now an urgent need. No general list has been published since the outbreak of the world war in 1914. Since then international seismological service has been interrupted, certain domestic services have been disrupted, and sweeping changes in personnel have occurred. Also some new stations have been established, and changes in equipment have been made. The need for a new list is emphasized by requests for information received recently by the Secretary of the American Geophysical Union, which is the American “National Committee" of the International Geodetic and Geophysical Union established in affiliation with the International Research Council at the international scientific conference held at Brussels in July, 1919. It therefore seems a fitting task for the Section on Seismology of the American Geophysical Union to initiate inquiries and to undertake the preparation of such a list. In this the Section seeks to cooperate with and to avail itself of the assistance of the Research Information Service established by the National Research Council of the United States to serve as a general bureau of information for scientific and industrial research. The Research Information Service has many functions to perform, among them the maintenance of catalogs of information affecting progress in research. A list of the seismological stations of the world giving the location and usual constants of the station and its equipment, its personnel, and its institutional foundation is an especially appropriate body of information for this Service to maintain in its files. Therefore the officers of the American Geophysical Union and its Section of Seismology, and of the Research Information Service, earnestly request that the information indicated on the enclosed questionnaire be sent at your early convenience to the Research Information Service, National Research Council, Washington, D. C., U. S. A. The value of a list of seismological stations will depend upon its completeness and accuracy. It should be assembled and prepared for publication at an early date. Assuring you of our great appreciation of your prompt and hearty cooperation in this inquiry, Yours very truly, (Signed) ROBERT M. YERKES Robert M. Yerkes, Chairman, Research Information Service A second letter was mailed in November, 1920, to those stations which had failed to reply to the first. On the whole the response to this inquiry has been very gratifying indeed, although to date no replies have been received from many of the stations addressed. There are several reasons which may account for this. A considerable number of letters of both mailings have been returned undelivered by the postal services, either because the stations had been discontinued or had never been established, or because of the disorganized status of postal communication in or with certain countries; and perhaps in some instances because of uncertain or inadequate address. It is probable, too, that a small percentage of the letters of both mailings neither reached their destinations nor were returned undelivered. It seems certain, also, that some of the letters were properly delivered but that, for one reason or another, no reply has been received in return. It is known that some early replies went astray. However, except for a neglect to answer on the part of some stations, doubtless due to oversight in most cases, the inquiry has met with cordial support, and many appreciative letters have been received containing suggestions for improvement which are incorporated in a second inquiry which is initiated here with the publication of this list. The publication of a revised list as early as is practicable is intended. In only two or three cases has the information requested been definitely refused. Each refusal was a consequence of the nationality of the Director of the station. In two cases the refusal was based on the fact that the nation of the writer was not admitted to the International Research Council with which the National Research Council of the United States is affiliated. In these cases the information desired had to be supplied, so far as possible, from other sources. Replies have been received covering approximately two hundred and twenty-five stations now in operation and several other projected stations or former stations temporarily discontinued, somewhat less than two hundred and fifty in all. In many cases the data returned are not as complete or specific as is to be desired. It is hoped that the second inquiry, here initiated, will remedy these defects. In the case of these stations, however, the data printed may be considered up to date and authentic, errors of publication excepted. More than one hundred stations marked in this list with an asterisk (*) are described on the basis of older data, since no replies have been received from these places. For almost all of these the data for the descriptions have been furnished from his own files by Professor Harry Fielding Reid of the Johns Hopkins University, Chairman of the Section of Seismology of the American Geophysical Union. Additional information has been contributed by Professor J. B. Woodworth of Harvard University, and by the Rev. F. A. Tondorf, S.J., of Georgetown University, and in isolated instances by several others. Beyond mere mention, or simply an address, no information has been obtained regarding stations supposed to be maintained at Dawson, Yukon District, Canada; Frameries, Belgium; Universidad Nacional de Habana, Havana, Cuba; Idria, Jugoslavia; Kinda, Katanga, Belgian Congo; Monteleone-Calabro, Italy; San José, Costa Rica; Collége du Sacré Coeur, Smyrna, Asia Minor; and Szeged, Hungary. Mexico The Servicio Seismológico Nacional de Mexico of the Instituto Geológico y del Servicio Seismológico is under the direction of Ing. Leopoldo Salazar Salinas, Director; Ing. Heriberto Camacho, Jefe de la Sección de Seismología; and Manuel Muñez Lumbier, Inspector del Servicio Seismológico. The operation of seismologic stations at Guadalajara, and at Monterrey will be renewed in a short time. Later, stations will be installed at Morelia, Colina, and Salina Cruz. Roumania For the time being the stations in Roumania, and the territory annexed as a result of the war, are out of commission because of the war and the disturbed conditions which have followed it. This service is to be re-established as promptly as circumstances will allow. At the present time there still exists some uncertainty concerning the stable political boundaries of some of the states which have arisen out of the re-adjustments resulting from the war. At the date of writing Harpoot, Armenia, remains in Turkish territory; and in what was formerly Russian territory in the Caucasus region the stations at Achalkalaki, Batum, Boržom, and Tiflis are now within the boundaries of the republic of Georgia, and those at Baku, Balakhany, and Šemakha are in the republic of Azerbaijan. In the list the stations have been arranged in the alphabetical order of the places where they are located. A few cross-references have been inserted to facilitate the use of the list. In preparing the information for printing it was found advisable to depart from the form of the questionnaire sent out, and to state the data in simple English phrases. Every reasonable effort has been made to minimize error. Nevertheless, under all the circumstances, in dealing with over two hundred responses written, in many cases with the pen, in several different languages with somewhat different notation and symbols and filled out with different degrees of completeness,together with more than one hundred descriptions based on data several years old in most instances-it is obvious that the list. must contain many errors, and that it is sadly incomplete. This practically necessitates the publication of a revised and corrected list at an early date. This revised list should also be improved in accordance with requests and suggestions received. To facilitate this a second, modified form of questionnaire has been prepared. A copy of this is enclosed with each copy of the list. It is requested that, upon receipt of the list and the accompanying questionnaire, in all cases where it is necessary or desirable to communicate information in addition to or in correction of that published, these revised questionnaires be filled out as completely and precisely as possible and returned at an early time to the designated address. All into whose hands this list comes are earnestly requested to bring to our attention any errors or omissions of any kind affecting it. Suggestions will be welcomed. These should be submitted by letter at an early date. The whole seismologic fraternity is urged to cooperate in making the revised edition complete and accurate. The compiler wishes here to express his sincere appreciation of the cordial reception which has been accorded to this effort, and to tender his thanks to all who have so generously assisted in the assembly and preparation of the materials of this list. To Professor Reid, Chairman of the Section of Seismology of the American Geophysical Union, whose contribution to the work has been coordinate with his own, the compiler wishes especially to make grateful acknowledgment. 14 April, 1921. National Research Council, Washington, D. C. AACHEN, GERMANY Erdbebenstation der Technischen Hochschule Aachen, inaugurated in 1908. Prof. Dr. P. Wilski, Director. Markscheide-Institut. Postal address: Erdbebenstation der Technischen Hochschule, Aachen, Deutschland. =50°46′49.25'' N., λ=6°29′05.7'' E., h=179 m. Lithologic foundation: firm sandstone. Equipment: Wiechert inverted pendulum, mass 1,000 kg., two comp. N and E. Constants: V To r/T? Wiechert horizontal pendulum, phot. registr., mass 80 kg., three comp. Time service: time is kept and marked by excellent contact clocks (Riefler, and Strasser und Rohde). Time comparisons made by tele |