{"id":36368,"date":"2024-06-28T16:14:13","date_gmt":"2024-06-28T14:14:13","guid":{"rendered":"https:\/\/karmaka.de\/?p=36368"},"modified":"2024-06-28T16:14:14","modified_gmt":"2024-06-28T14:14:14","slug":"an-estimate-of-the-impact-rate-on-mars-from-statistics-of-very-high-frequency-marsquakes","status":"publish","type":"post","link":"https:\/\/karmaka.de\/?p=36368","title":{"rendered":"An estimate of the impact rate on Mars from statistics of very-high-frequency marsquakes<span class=\"badge-status\" style=\"background:#787878\">OPEN ACCESS<\/span>&nbsp;"},"content":{"rendered":"\n<p>G\u00e9raldine Zenh\u00e4usern, Natalia W\u00f3jcicka, Simon C. St\u00e4hler, Gareth S. Collins, Ingrid J. Daubar, Martin Knapmeyer, Savas Ceylan, John F. Clinton &amp; Domenico Giardini<\/p>\n\n\n\n<p>Nature Astronomy<br>Published: 28 June 2024<\/p>\n\n\n\n<p><a href=\"https:\/\/www.nature.com\/articles\/s41550-024-02301-z\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>LINK (OPEN ACCESS)<\/strong><\/a><br><a href=\"https:\/\/www.nature.com\/articles\/s41550-024-02301-z.pdf\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>PDF (OPEN ACCESS)<\/strong><\/a><\/p>\n\n\n\n<p class=\"justify-text\">&#8220;The number density of impact craters on a planetary surface is used to determine its age, which requires a model for the production rate of craters of different sizes. On Mars, however, estimates of the production rate of small craters (&lt;60\u2009m) from orbital imagery and from extrapolation of lunar impact data do not match. Here we provide a new independent estimate of the impact rate by analysing the seismic events recorded by the seismometer onboard NASA\u2019s InSight lander. Some previously confirmed seismically detected impacts are part of a larger class of marsquakes (very high frequency, VF). Although a non-impact origin cannot be definitively excluded for each VF event, we show that the VF class as a whole is plausibly caused by meteorite impacts. We use an empirical scaling relationship to convert between seismic moment and crater diameter. Applying area and time corrections to derive a global impact rate, we find that 280\u2013360 craters &gt;8\u2009m diameter are formed globally per year, consistent with previously published chronology model rates and above the rates derived from freshly imaged craters. Our work shows that seismology is an effective tool for determining meteoroid impact rates and complements other methods such as orbital imaging.&#8221;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>G\u00e9raldine Zenh\u00e4usern, Natalia W\u00f3jcicka, Simon C. St\u00e4hler, Gareth S. Collins, Ingrid J. Daubar, Martin Knapmeyer, Savas Ceylan, John F. Clinton &amp; Domenico Giardini Nature AstronomyPublished: 28 June 2024 LINK (OPEN ACCESS)PDF (OPEN ACCESS) &#8220;The number&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[90,122,96],"tags":[4800,1858,141],"_links":{"self":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/36368"}],"collection":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=36368"}],"version-history":[{"count":1,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/36368\/revisions"}],"predecessor-version":[{"id":36369,"href":"https:\/\/karmaka.de\/index.php?rest_route=\/wp\/v2\/posts\/36368\/revisions\/36369"}],"wp:attachment":[{"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=36368"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=36368"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/karmaka.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=36368"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}