{"id":4971,"date":"2018-02-01T15:09:57","date_gmt":"2018-02-01T14:09:57","guid":{"rendered":"http:\/\/igcas.antstudio.eu\/?page_id=4971"},"modified":"2024-06-27T12:48:33","modified_gmt":"2024-06-27T10:48:33","slug":"praha-pra","status":"publish","type":"page","link":"https:\/\/www.ig.cas.cz\/en\/observatories\/czech-regional-seismic-network\/praha-pra\/","title":{"rendered":"Praha (PRA)"},"content":{"rendered":"<p>[et_pb_section fb_built=&#8221;1&#8243; admin_label=&#8221;section&#8221; _builder_version=&#8221;4.16&#8243; custom_padding=&#8221;21px|0px|11px|0px&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_row column_structure=&#8221;3_4,1_4&#8243; admin_label=&#8221;row&#8221; _builder_version=&#8221;4.16&#8243; background_size=&#8221;initial&#8221; background_position=&#8221;top_left&#8221; background_repeat=&#8221;repeat&#8221; custom_padding=&#8221;0px|0px|28.95px|0px&#8221; global_colors_info=&#8221;{}&#8221;][et_pb_column type=&#8221;3_4&#8243; _builder_version=&#8221;4.16&#8243; custom_padding=&#8221;|||&#8221; global_colors_info=&#8221;{}&#8221; custom_padding__hover=&#8221;|||&#8221;][et_pb_text _builder_version=&#8221;4.16&#8243; background_size=&#8221;initial&#8221; background_position=&#8221;top_left&#8221; background_repeat=&#8221;repeat&#8221; global_colors_info=&#8221;{}&#8221;]<strong>Seismological station\u00a0Praha (PRA)<\/strong> was established in 1924 by Prof. L\u00e1ska\u00a0in the cellar of the Institute of Physics of Charles University at Karlov.\u00a0Since 1927 station PRA is involved into the international seismological\u00a0exchange. It was\u00a0the second station in Europe to\u00a0calculate the magnitude of earthquakes. During the years both the affiliation (State Institute of Geophysics, Geophysical Institute, Charles University) and instumentation\u00a0(horizontal Wiechert, Kirnos, Guralp) changed. At present station PRA is equipped with broadband instrumentation.\u00a0Digital data are transferred in real time to Institute of Geophysics, Data are also used for educational purposed.\u00a0Station PRA is part of the Czech Regional Seismic Network.<br \/>\n[\/et_pb_text][et_pb_code _builder_version=&#8221;4.16&#8243; global_colors_info=&#8221;{}&#8221;]<img decoding=\"async\" src=\"http:\/\/czechgeo.cz\/plotfiles\/PRA\/2018_01_20.png\" id=\"image\" name=\"image\" \/><!-- [et_pb_line_break_holder] --><button type=\"button\" onclick=\"plusClick()\">previous day<\/button><!-- [et_pb_line_break_holder] --><button type=\"button\" onclick=\"minusClick()\">next day<\/button><!-- [et_pb_line_break_holder] --><script><!-- [et_pb_line_break_holder] -->var pre='http:\/\/czechgeo.ig.cas.cz\/plotfiles\/gfu\/PRA\/';<!-- [et_pb_line_break_holder] -->var datum = new Date();<!-- [et_pb_line_break_holder] -->var y = datum.getFullYear();<!-- [et_pb_line_break_holder] -->var m = (\"0\"+(datum.getMonth()+1)).slice(-2);<!-- [et_pb_line_break_holder] -->var d = (\"0\"+datum.getDate()).slice(-2);<!-- [et_pb_line_break_holder] -->var adresa = pre+y+\"_\"+m+\"_\"+d+\".png\";<!-- [et_pb_line_break_holder] -->document.getElementById('image').src = adresa;<!-- [et_pb_line_break_holder] -->var off = 0;<!-- [et_pb_line_break_holder] -->var datum2=new Date();<!-- [et_pb_line_break_holder] -->var msinday=86400000;<!-- [et_pb_line_break_holder] --><!-- [et_pb_line_break_holder] -->function plusClick() {<!-- [et_pb_line_break_holder] --> if (off<10){ <!-- [et_pb_line_break_holder] --> off += 1;<!-- [et_pb_line_break_holder] --> datum2.setTime(datum.getTime()-86400000*off);<!-- [et_pb_line_break_holder] --> adresa = pre+datum2.getFullYear()+\"_\"+(\"0\"+(datum2.getMonth()+1)).slice(-2)+\"_\"+(\"0\"+datum2.getDate()).slice(-2)+\".png\";<!-- [et_pb_line_break_holder] --> document.getElementById('image').src = adresa;<!-- [et_pb_line_break_holder] --> }<!-- [et_pb_line_break_holder] --> else{<!-- [et_pb_line_break_holder] --> }<!-- [et_pb_line_break_holder] --> };<!-- [et_pb_line_break_holder] -->function minusClick() {<!-- [et_pb_line_break_holder] --> if (off>0){ <!-- [et_pb_line_break_holder] --> off -= 1;<!-- [et_pb_line_break_holder] --> datum2.setTime(datum.getTime()-86400000*off);<!-- [et_pb_line_break_holder] --> adresa = pre+datum2.getFullYear()+\"_\"+(\"0\"+(datum2.getMonth()+1)).slice(-2)+\"_\"+(\"0\"+datum2.getDate()).slice(-2)+\".png\";<!-- [et_pb_line_break_holder] --> document.getElementById('image').src = adresa;<!-- [et_pb_line_break_holder] --> }<!-- [et_pb_line_break_holder] --> else{<!-- [et_pb_line_break_holder] --> }<!-- [et_pb_line_break_holder] --> };<!-- [et_pb_line_break_holder] --><\/script><!-- [et_pb_line_break_holder] --><!-- [et_pb_line_break_holder] -->[\/et_pb_code][\/et_pb_column][et_pb_column type=&#8221;1_4&#8243; _builder_version=&#8221;4.16&#8243; custom_padding=&#8221;|||&#8221; global_colors_info=&#8221;{}&#8221; custom_padding__hover=&#8221;|||&#8221;][et_pb_image src=&#8221;https:\/\/www.ig.cas.cz\/wp-content\/uploads\/2018\/02\/pra.jpg&#8221; align_tablet=&#8221;center&#8221; align_phone=&#8221;&#8221; align_last_edited=&#8221;on|desktop&#8221; _builder_version=&#8221;4.16&#8243; global_colors_info=&#8221;{}&#8221;]&nbsp;<br \/>\n[\/et_pb_image][et_pb_text _builder_version=&#8221;4.16&#8243; global_colors_info=&#8221;{}&#8221;]<\/p>\n<p><strong>Coordinates:<\/strong> 50.0702N 14.4331E<br \/><strong>Altitude:<\/strong>\u00a0225&nbsp;m<br \/><strong>Seismometre:<\/strong>\u00a0broadband sensor Guralp CMG-3T<br \/><strong>Recording system:<\/strong> Gurlap DAS U-S3<br \/><strong>Sampling frequency:<\/strong> 20 Hz<br \/><strong>Dynamic range<\/strong>: 140 dB<br \/><strong>Frequency range:<\/strong> 0.02-120 s<br \/><strong>Data format:<\/strong> GCF, miniSEED<br \/><strong>Metadata:<\/strong> <a href=\"https:\/\/www.ig.cas.cz\/wp-content\/uploads\/2024\/06\/dataless_CRSN_PRA.txt\">dataless SEED<\/a>, <a href=\"https:\/\/www.ig.cas.cz\/wp-content\/uploads\/2024\/06\/stationxml_CRSN_PRA.txt\">stationxml<\/a><br \/><strong>Available data:<\/strong> April 2012 &#8211; present<br \/><strong>Operator:<\/strong>\u00a0Faculty of Mathematics-Physics of the\u00a0Charles University in Prague<br \/><strong>Contact person:<\/strong>\u00a0Vladim\u00edr Plicka\u00a0&#8211; <a href=\"mailto:vp@seis.karlov.mff.cuni.cz\">vladimir.plicka@mff.cuni.cz<\/a><\/p>\n<p>[\/et_pb_text][\/et_pb_column][\/et_pb_row][\/et_pb_section]<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Seismological station\u00a0Praha (PRA) was established in 1924 by Prof. L\u00e1ska\u00a0in the cellar of the Institute of Physics of Charles University at Karlov.\u00a0Since 1927 station PRA is involved into the international seismological\u00a0exchange. It was\u00a0the second station in Europe to\u00a0calculate the magnitude of earthquakes. During the years both the affiliation (State Institute of Geophysics, Geophysical Institute, Charles [&hellip;]<\/p>\n","protected":false},"author":10,"featured_media":4844,"parent":7585,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_et_pb_use_builder":"on","_et_pb_old_content":"Seismologick\u00e1 stanice Pr\u016fhonice (PRU) byla zalo\u017eena v r. 1957. Nach\u00e1z\u00ed se v zadn\u00ed, klidn\u011bj\u0161\u00ed \u010d\u00e1sti pr\u016fhonick\u00e9ho parku v m\u011blk\u00e9m, um\u011ble vybudovan\u00e9m sklep\u011b. Seismometry jsou instalov\u00e1ny na masivn\u00edch betonov\u00fdch pil\u00ed\u0159\u00edch. Stanice je vybavena t\u0159\u00edslo\u017ekov\u00fdmi kr\u00e1tkoperiodick\u00fdmi p\u0159\u00edstroji, vhodn\u00fdmi hlavn\u011b pro registraci bl\u00edzk\u00fdch seismick\u00fdch jev\u016f a pr\u016fmyslov\u00fdch odpal\u016f, a \u0161irokop\u00e1smov\u00fdm seismometrem pro registraci vzd\u00e1len\u011bj\u0161\u00edch zem\u011bt\u0159esen\u00ed. Digit\u00e1ln\u00ed data jsou p\u0159en\u00e1\u0161ena v re\u00e1ln\u00e9m \u010dase optick\u00fdm kabelem a p\u0159es internet do Geofyzik\u00e1ln\u00edho \u00fastavu. Stanice je sou\u010d\u00e1st\u00ed \u010cesk\u00e9 region\u00e1ln\u00ed seismick\u00e9 s\u00edt\u011b.","_et_gb_content_width":"","footnotes":""},"categories":[],"tags":[],"class_list":["post-4971","page","type-page","status-publish","has-post-thumbnail","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Praha (PRA) - Geofyzik\u00e1ln\u00ed \u00fastav Akademie v\u011bd \u010cR, v.v.i.<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.ig.cas.cz\/en\/observatories\/czech-regional-seismic-network\/praha-pra\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Praha (PRA) - Geofyzik\u00e1ln\u00ed \u00fastav Akademie v\u011bd \u010cR, v.v.i.\" \/>\n<meta property=\"og:description\" content=\"Seismological station\u00a0Praha (PRA) was established in 1924 by Prof. L\u00e1ska\u00a0in the cellar of the Institute of Physics of Charles University at Karlov.\u00a0Since 1927 station PRA is involved into the international seismological\u00a0exchange. 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