{"id":11583,"date":"2021-07-14T19:32:10","date_gmt":"2021-07-14T17:32:10","guid":{"rendered":"http:\/\/volcanx.cluster031.hosting.ovh.net\/?page_id=11583"},"modified":"2021-07-15T11:41:13","modified_gmt":"2021-07-15T09:41:13","slug":"signaux-sismiques","status":"publish","type":"page","link":"https:\/\/volcanofoundation.org\/fr\/renforcer-la-connaissance-des-risques\/monitoring\/tremblements-de-terre\/signaux-sismiques\/","title":{"rendered":"SIGNAUX SISMIQUES"},"content":{"rendered":"<div id=\"av_section_1\" class=\"avia-section av-av_section-a3505495476c97acb77226663f388d50 main_color avia-section-default avia-no-border-styling  avia-builder-el-0  el_before_av_section  avia-builder-el-first  avia-full-stretch av-parallax-section avia-bg-style-parallax av-minimum-height av-minimum-height-25 av-height-25  container_wrap fullsize\" data-section-bg-repeat=\"stretch\" data-av_minimum_height_pc=\"25\" data-av_min_height_opt=\"25\"><div class=\"av-parallax\" data-avia-parallax-ratio=\"0.3\"><div class=\"av-parallax-inner main_color avia-full-stretch\"><\/div><\/div><div class=\"container av-section-cont-open\"><main role=\"main\" itemprop=\"mainContentOfPage\" class=\"template-page content  av-content-full alpha units\"><div class=\"post-entry post-entry-type-page post-entry-11583\"><div class=\"entry-content-wrapper clearfix\">\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-av_one_fifth-25347b0a799d5b9f7058434b2a9c3182\">\n.flex_column.av-av_one_fifth-25347b0a799d5b9f7058434b2a9c3182{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div class=\"flex_column av-av_one_fifth-25347b0a799d5b9f7058434b2a9c3182 av_one_fifth  avia-builder-el-1  el_before_av_three_fifth  avia-builder-el-first  first flex_column_div av-zero-column-padding  \"><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-av_three_fifth-f7c1061df29de8cca6b42fcf455fe4a0\">\n.flex_column.av-av_three_fifth-f7c1061df29de8cca6b42fcf455fe4a0{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div class=\"flex_column av-av_three_fifth-f7c1061df29de8cca6b42fcf455fe4a0 av_three_fifth  avia-builder-el-2  el_after_av_one_fifth  el_before_av_one_fifth  flex_column_div av-zero-column-padding  \"><style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-av_textblock-8d09e837ca2380e6bdc85d849f6641d9\">\n#top .av_textblock_section.av-av_textblock-8d09e837ca2380e6bdc85d849f6641d9 .avia_textblock{\ncolor:#ffffff;\n}\n<\/style>\n<section class=\"av_textblock_section av-av_textblock-8d09e837ca2380e6bdc85d849f6641d9 \" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\"><div class=\"avia_textblock av_inherit_color\" itemprop=\"text\"><div class=\"h2-cinta-programas\">\n<h1 style=\"text-align: center; font-size: 2.5em;\">RENFORCER LA CONNAISSANCE DES RISQUES<\/h1>\n<\/div>\n<\/div><\/section><br>\n<section class=\"av_textblock_section av-av_textblock-820f97e5aca1e77a0a12cd8a6430c9f2 \" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\"><div class=\"avia_textblock\" itemprop=\"text\"><p class=\"p-cinta-programas\" style=\"text-align: center; background: #f5312a !important;\">POURQUOI LA FONDATION EST N&Eacute;E ?<span class=\"flecha-donativo\" style=\"vertical-align: inherit;\"> &gt;<\/span><\/p>\n<\/div><\/section><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-av_one_fifth-f7c1061df29de8cca6b42fcf455fe4a0\">\n.flex_column.av-av_one_fifth-f7c1061df29de8cca6b42fcf455fe4a0{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div class=\"flex_column av-av_one_fifth-f7c1061df29de8cca6b42fcf455fe4a0 av_one_fifth  avia-builder-el-5  el_after_av_three_fifth  avia-builder-el-last  flex_column_div av-zero-column-padding  \"><\/div>\n\n<\/div><\/div><\/main><!-- close content main element --><\/div><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-k3yaxsym-b831a12c8acddceb21a18cbb360fd41d\">\n.avia-section.av-k3yaxsym-b831a12c8acddceb21a18cbb360fd41d{\nbackground-color:#000000;\nbackground-image:unset;\n}\n.avia-section.av-k3yaxsym-b831a12c8acddceb21a18cbb360fd41d .av-section-color-overlay{\nopacity:0.9;\nbackground-color:#000000;\n}\n<\/style>\n<div id=\"av_section_2\" class=\"avia-section av-k3yaxsym-b831a12c8acddceb21a18cbb360fd41d main_color avia-section-default avia-no-border-styling  avia-builder-el-6  el_after_av_section  el_before_av_textblock  avia-bg-style-fixed av-section-color-overlay-active container_wrap fullsize\"><div class=\"av-section-color-overlay-wrap\"><div class=\"av-section-color-overlay\"><\/div><div class=\"container av-section-cont-open\"><div class=\"template-page content  av-content-full alpha units\"><div class=\"post-entry post-entry-type-page post-entry-11583\"><div class=\"entry-content-wrapper clearfix\">\n<div class=\"flex_column_table av-a5p0bb-0286912bb6bfb93801b9fa33860921b2 sc-av_one_full av-equal-height-column-flextable\">\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-a5p0bb-0286912bb6bfb93801b9fa33860921b2\">\n.flex_column.av-a5p0bb-0286912bb6bfb93801b9fa33860921b2{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div class=\"flex_column av-a5p0bb-0286912bb6bfb93801b9fa33860921b2 av_one_full  avia-builder-el-7  avia-builder-el-no-sibling  first flex_column_table_cell av-equal-height-column av-align-middle av-zero-column-padding  \"><style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-joihkone-69e81b3ac324ed7c1268b0d71e700013\">\n#top .av_textblock_section.av-joihkone-69e81b3ac324ed7c1268b0d71e700013 .avia_textblock{\nfont-size:18px;\ncolor:#ffffff;\n}\n\n@media only screen and (min-width: 768px) and (max-width: 989px){ \n#top .av_textblock_section.av-joihkone-69e81b3ac324ed7c1268b0d71e700013 .avia_textblock{\nfont-size:16px;\n}\n}\n\n@media only screen and (min-width: 480px) and (max-width: 767px){ \n#top .av_textblock_section.av-joihkone-69e81b3ac324ed7c1268b0d71e700013 .avia_textblock{\nfont-size:16px;\n}\n}\n\n@media only screen and (max-width: 479px){ \n#top .av_textblock_section.av-joihkone-69e81b3ac324ed7c1268b0d71e700013 .avia_textblock{\nfont-size:16px;\n}\n}\n<\/style>\n<section class=\"av_textblock_section av-joihkone-69e81b3ac324ed7c1268b0d71e700013 \" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\"><div class=\"avia_textblock av_inherit_color\" itemprop=\"text\"><blockquote>\n<p><a href=\"http:\/\/www.undrr.org\"><strong>LES DISASTERS NE SONT PAS NATURELS<\/strong><\/a>, ils sont construits socialement, par manque de pr&eacute;paration, de pr&eacute;vention, de travail d&rsquo;att&eacute;nuation, d&rsquo;&eacute;ducation et de suivi. <a class=\"glossaryLink\"  aria-describedby=\"tt\"  data-cmtooltip=\"&lt;div class=glossaryItemTitle&gt;CE&lt;\/div&gt;&lt;div class=glossaryItemBody&gt;Abr&eacute;viation de &amp;quot;l&amp;#039;&egrave;re commune&amp;quot; ou &amp;quot;l&amp;#039;&egrave;re actuelle&amp;quot;. CE se r&eacute;f&egrave;re &agrave; l&amp;#039;ann&eacute;e &eacute;coul&eacute;e depuis le d&eacute;but de l&amp;#039;&egrave;re actuelle dans le calendrier julien ou gr&eacute;gorien, par exemple l&amp;#039;ann&eacute;e civile. L&amp;#039;&egrave;re pr&eacute;c&eacute;dente est appel&eacute;e &amp;quot;Avant l&amp;#039;&egrave;re actuelle&amp;quot; ou BCE.&lt;\/div&gt;\"  href=\"https:\/\/volcanofoundation.org\/fr\/glossary\/ce-fr\/\"  data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]'  tabindex='0' role='link'>Ce<\/a> sont des risques ou des dangers naturels qui ont un impact sur les soci&eacute;t&eacute;s vuln&eacute;rables. Les connaissances aident &agrave; <strong>r&eacute;duire la vuln&eacute;rabilit&eacute; sociale<\/strong> et <strong>structurale<\/strong> afin d&rsquo;avoir des soci&eacute;t&eacute;s plus <strong>r&eacute;silientes<\/strong>!<\/p>\n<\/blockquote>\n<\/div><\/section><\/div><\/div><!--close column table wrapper. Autoclose: 1 -->\n<\/div><\/div><\/div><!-- close content main div --><\/div><\/div><\/div><div id=\"after_section_2\" class=\"main_color av_default_container_wrap container_wrap fullsize\"><div class=\"container av-section-cont-open\"><div class=\"template-page content  av-content-full alpha units\"><div class=\"post-entry post-entry-type-page post-entry-11583\"><div class=\"entry-content-wrapper clearfix\">\n<section class=\"av_textblock_section av-kqt9jd5e-cd33964ef4e3b772df7fef522b816d29 \" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\"><div class=\"avia_textblock\" itemprop=\"text\"><h2>Les signaux sismiques ont des signatures uniques pour diff&eacute;rents types de mouvements du sol<\/h2>\n<\/div><\/section>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-kqt9ln1w-f6affe7cdeee6be02fc225bbc4bc5689\">\n#top .hr.av-kqt9ln1w-f6affe7cdeee6be02fc225bbc4bc5689{\nmargin-top:15px;\nmargin-bottom:15px;\n}\n.hr.av-kqt9ln1w-f6affe7cdeee6be02fc225bbc4bc5689 .hr-inner{\nwidth:100%;\nborder-color:#d8d8d8;\n}\n<\/style>\n<div class=\"hr av-kqt9ln1w-f6affe7cdeee6be02fc225bbc4bc5689 hr-custom  avia-builder-el-10  el_after_av_textblock  el_before_av_three_fifth  hr-center hr-icon-no\"><span class=\"hr-inner inner-border-av-border-thin\"><span class=\"hr-inner-style\"><\/span><\/span><\/div>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-1wlhzr6-8cc129343b9618e21784b665a1361b31\">\n.flex_column.av-1wlhzr6-8cc129343b9618e21784b665a1361b31{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div class=\"flex_column av-1wlhzr6-8cc129343b9618e21784b665a1361b31 av_three_fifth  avia-builder-el-11  el_after_av_hr  el_before_av_two_fifth  first flex_column_div av-zero-column-padding  \"><section class=\"av_textblock_section av-kqt9tgn4-955ae44a3b12f5f76d41e08b4c147261 \" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\"><div class=\"avia_textblock\" itemprop=\"text\"><h3>Les sismom&egrave;tres peuvent d&eacute;tecter les mouvements du sol<\/h3>\n<p>Les sismom&egrave;tres peuvent d&eacute;tecter les mouvements du sol caus&eacute;s par diff&eacute;rents types de ph&eacute;nom&egrave;nes, tels que le vent, les explosions volcaniques d&rsquo;origine humaine, les avalanches de neige et de pierres,<a title=\"LAHAR DETECTION\" href=\"http:\/\/volcanx.cluster031.hosting.ovh.net\/building-risk-knowledge\/monitoring\/hydrology\/lahar-detection\/\"> lahars<\/a> et les s&eacute;ismes. Tout comme nous avons des signatures manuscrites uniques, chaque type de s&eacute;isme peut g&eacute;n&eacute;rer une &laquo;&nbsp;signature&nbsp;&raquo; sismique unique que nous pouvons apprendre &agrave; reconna&icirc;tre et &agrave; identifier. Une fois identifi&eacute;e, nous pouvons utiliser cette signature pour d&eacute;terminer le processus qui l&rsquo;a provoqu&eacute; &agrave; l&rsquo;avenir.<\/p>\n<\/div><\/section><br>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-kqta1i5b-a345f9d882c51d4089993cf6d16e9b60\">\n#top .hr.hr-invisible.av-kqta1i5b-a345f9d882c51d4089993cf6d16e9b60{\nheight:20px;\n}\n<\/style>\n<div class=\"hr av-kqta1i5b-a345f9d882c51d4089993cf6d16e9b60 hr-invisible  avia-builder-el-13  el_after_av_textblock  el_before_av_textblock \"><span class=\"hr-inner \"><span class=\"hr-inner-style\"><\/span><\/span><\/div><br>\n<section class=\"av_textblock_section av-kqtdsfvd-d152eb0e3d3e094fcc403a1e69a26b44 \" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\"><div class=\"avia_textblock\" itemprop=\"text\"><p>Les diff&eacute;rents types de signaux peuvent souvent &ecirc;tre distingu&eacute;s en comparant l&rsquo;amplitude (hauteur de la forme d&rsquo;onde), la fr&eacute;quence (largeur d&rsquo;un pic &agrave; l&rsquo;autre dans la forme d&rsquo;onde) et la dur&eacute;e (longueur de la forme d&rsquo;onde) de chaque signature. La comparaison des sismogrammes de plusieurs stations aide &agrave; distinguer avec pr&eacute;cision ces types de sources.<\/p>\n<\/div><\/section><br>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-1be8acw-edad6df5b24231d2c407a1b98d1fe3f4\">\n#top .hr.hr-invisible.av-1be8acw-edad6df5b24231d2c407a1b98d1fe3f4{\nheight:20px;\n}\n<\/style>\n<div class=\"hr av-1be8acw-edad6df5b24231d2c407a1b98d1fe3f4 hr-invisible  avia-builder-el-15  el_after_av_textblock  avia-builder-el-last \"><span class=\"hr-inner \"><span class=\"hr-inner-style\"><\/span><\/span><\/div><\/div>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-1iz7j36-2c9786a9f3f90bd1396461500bfb925f\">\n.flex_column.av-1iz7j36-2c9786a9f3f90bd1396461500bfb925f{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div class=\"flex_column av-1iz7j36-2c9786a9f3f90bd1396461500bfb925f av_two_fifth  avia-builder-el-16  el_after_av_three_fifth  avia-builder-el-last  flex_column_div av-zero-column-padding  \"><p>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-kqtcpnnn-44c07e98b59e6f911e275141736c8f9f\">\n.avia-image-container.av-kqtcpnnn-44c07e98b59e6f911e275141736c8f9f img.avia_image{\nbox-shadow:none;\n}\n.avia-image-container.av-kqtcpnnn-44c07e98b59e6f911e275141736c8f9f .av-image-caption-overlay-center{\ncolor:#ffffff;\n}\n<\/style>\n<\/p><div class=\"avia-image-container av-kqtcpnnn-44c07e98b59e6f911e275141736c8f9f av-styling- avia-align-center  avia-builder-el-17  el_before_av_textblock  avia-builder-el-first \" itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\"><div class=\"avia-image-container-inner\"><div class=\"avia-image-overlay-wrap\"><img decoding=\"async\" fetchpriority=\"high\" class=\"wp-image-11587 avia-img-lazy-loading-not-11587 avia_image \" src=\"https:\/\/volcanofoundation.org\/wp-content\/uploads\/2021\/07\/Seismic-signatures1.jpg\" alt=\"\" title=\"Seismic signatures(1)\" height=\"446\" width=\"391\" itemprop=\"thumbnailUrl\" srcset=\"https:\/\/volcanofoundation.org\/wp-content\/uploads\/2021\/07\/Seismic-signatures1.jpg 391w, https:\/\/volcanofoundation.org\/wp-content\/uploads\/2021\/07\/Seismic-signatures1-263x300.jpg 263w\" sizes=\"(max-width: 391px) 100vw, 391px\"\/><\/div><\/div><\/div><br>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-kqtcpuh7-d8db4528b4900c045b62972c54904769\">\n#top .av_textblock_section.av-kqtcpuh7-d8db4528b4900c045b62972c54904769 .avia_textblock{\nfont-size:14px;\n}\n<\/style>\n<section class=\"av_textblock_section av-kqtcpuh7-d8db4528b4900c045b62972c54904769 \" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/CreativeWork\"><div class=\"avia_textblock\" itemprop=\"text\"><p><em>La forme g&eacute;n&eacute;rale de chaque signature sismique est facile &agrave; voir en comparant l&rsquo;amplitude (hauteur de la forme d&rsquo;onde), la fr&eacute;quence (largeur d&rsquo;un pic &agrave; l&rsquo;autre dans la forme d&rsquo;onde) et la dur&eacute;e (longueur de la forme d&rsquo;onde) de chaque signature. Les marques de &laquo;&nbsp;tic&nbsp;&raquo; sur chaque signature repr&eacute;sentent une minute dans le temps. L&rsquo;activit&eacute; sismique du volcan du Mont Rainier est surveill&eacute;e par les scientifiques du Pacific Northwest Seismic Network, de l&rsquo;Universit&eacute; de Washington, avec le soutien de l&rsquo;USGS.<\/em><\/p>\n<\/div><\/section><br>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-q980xc-50f7dd054b06f60518f9b118b6077c50\">\n#top .hr.hr-invisible.av-q980xc-50f7dd054b06f60518f9b118b6077c50{\nheight:30px;\n}\n<\/style>\n<div class=\"hr av-q980xc-50f7dd054b06f60518f9b118b6077c50 hr-invisible  avia-builder-el-19  el_after_av_textblock  avia-builder-el-last \"><span class=\"hr-inner \"><span class=\"hr-inner-style\"><\/span><\/span><\/div><\/div>\n<\/div><\/div><\/div><\/div><\/div>","protected":false},"excerpt":{"rendered":"<p>Seismometers can detect ground movements caused by different types of phenomena.<\/p>\n","protected":false},"author":8,"featured_media":11142,"parent":11552,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-11583","page","type-page","status-publish","has-post-thumbnail","hentry"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/volcanofoundation.org\/fr\/wp-json\/wp\/v2\/pages\/11583","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/volcanofoundation.org\/fr\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/volcanofoundation.org\/fr\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/volcanofoundation.org\/fr\/wp-json\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"https:\/\/volcanofoundation.org\/fr\/wp-json\/wp\/v2\/comments?post=11583"}],"version-history":[{"count":0,"href":"https:\/\/volcanofoundation.org\/fr\/wp-json\/wp\/v2\/pages\/11583\/revisions"}],"up":[{"embeddable":true,"href":"https:\/\/volcanofoundation.org\/fr\/wp-json\/wp\/v2\/pages\/11552"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/volcanofoundation.org\/fr\/wp-json\/wp\/v2\/media\/11142"}],"wp:attachment":[{"href":"https:\/\/volcanofoundation.org\/fr\/wp-json\/wp\/v2\/media?parent=11583"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}