Low-frequency earthquakes in the Mexican Sweet Spot
We use data from the Meso‐America Subduction Experiment to detect and locate low‐frequency earthquakes (LFEs) in the Mexican subduction zone. We use visually‐identified templates to perform a network waveform correlation search that produced ~17,000 robustly detected LFEs that form 15 distinct famil...
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| Veröffentlicht in: | Geophysical research letters 2013-06, Vol.40 (11), p.2661-2666 |
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| creator | Frank, William B. Shapiro, Nikolaï M. Kostoglodov, Vladimir Husker, Allen L. Campillo, Michel Payero, Juan S. Prieto, Germán A. |
| description | We use data from the Meso‐America Subduction Experiment to detect and locate low‐frequency earthquakes (LFEs) in the Mexican subduction zone. We use visually‐identified templates to perform a network waveform correlation search that produced ~17,000 robustly detected LFEs that form 15 distinct families. Stacking an LFE family's corresponding detections results in seismograms with high signal‐to‐noise ratios and clear P and S wave arrivals; we use these travel times to locate the sources. The resulting locations superpose a previously identified region of permanent non‐volcanic tremor (NVT) activity. Husker et al. (2012) called this region a Sweet Spot, suggesting that the local conditions are adequate to continuously generate NVT. The LFE hypocenters have been located at a depth of 40–45 km in an area that is surrounding the upper slab‐plate interface. We characterize their focal mechanisms by comparing their stacked seismograms to synthetic seismograms. This analysis reveals a common low‐dipping focal mechanism.
Key Points
Detected and characterized 15 low‐frequency earthquake families in Mexico
Sources locate to a region known for constant non‐volcanic tremor activity
Focal mechanisms reflect shearing on the subducting plate interface |
| doi_str_mv | 10.1002/grl.50561 |
| format | Article |
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Key Points
Detected and characterized 15 low‐frequency earthquake families in Mexico
Sources locate to a region known for constant non‐volcanic tremor activity
Focal mechanisms reflect shearing on the subducting plate interface</description><identifier>ISSN: 0094-8276</identifier><identifier>EISSN: 1944-8007</identifier><identifier>DOI: 10.1002/grl.50561</identifier><language>eng</language><publisher>Washington: Blackwell Publishing Ltd</publisher><subject>Earthquakes ; low-frequency ; mexico ; Sciences of the Universe ; Seismic activity ; Seismic phenomena ; Seismograms ; slow-slip ; Stacking ; subduction ; Sweets ; tremor ; Tremors ; Waveforms</subject><ispartof>Geophysical research letters, 2013-06, Vol.40 (11), p.2661-2666</ispartof><rights>2013. American Geophysical Union. All Rights Reserved.</rights><rights>Copyright</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c5041-b22a5bdfa4abaf33be38fabdd359bd82e3bb632c751c77d481ed7ed02e18127c3</citedby><cites>FETCH-LOGICAL-c5041-b22a5bdfa4abaf33be38fabdd359bd82e3bb632c751c77d481ed7ed02e18127c3</cites><orcidid>0000-0001-6971-4499</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://onlinelibrary.wiley.com/doi/pdf/10.1002%2Fgrl.50561$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1002%2Fgrl.50561$$EHTML$$P50$$Gwiley$$H</linktohtml><link.rule.ids>230,314,780,784,885,1416,1432,11513,27923,27924,45573,45574,46408,46467,46832,46891</link.rule.ids><backlink>$$Uhttps://insu.hal.science/insu-03581787$$DView record in HAL$$Hfree_for_read</backlink></links><search><creatorcontrib>Frank, William B.</creatorcontrib><creatorcontrib>Shapiro, Nikolaï M.</creatorcontrib><creatorcontrib>Kostoglodov, Vladimir</creatorcontrib><creatorcontrib>Husker, Allen L.</creatorcontrib><creatorcontrib>Campillo, Michel</creatorcontrib><creatorcontrib>Payero, Juan S.</creatorcontrib><creatorcontrib>Prieto, Germán A.</creatorcontrib><title>Low-frequency earthquakes in the Mexican Sweet Spot</title><title>Geophysical research letters</title><addtitle>Geophys. Res. Lett</addtitle><description>We use data from the Meso‐America Subduction Experiment to detect and locate low‐frequency earthquakes (LFEs) in the Mexican subduction zone. We use visually‐identified templates to perform a network waveform correlation search that produced ~17,000 robustly detected LFEs that form 15 distinct families. Stacking an LFE family's corresponding detections results in seismograms with high signal‐to‐noise ratios and clear P and S wave arrivals; we use these travel times to locate the sources. The resulting locations superpose a previously identified region of permanent non‐volcanic tremor (NVT) activity. Husker et al. (2012) called this region a Sweet Spot, suggesting that the local conditions are adequate to continuously generate NVT. The LFE hypocenters have been located at a depth of 40–45 km in an area that is surrounding the upper slab‐plate interface. We characterize their focal mechanisms by comparing their stacked seismograms to synthetic seismograms. This analysis reveals a common low‐dipping focal mechanism.
Key Points
Detected and characterized 15 low‐frequency earthquake families in Mexico
Sources locate to a region known for constant non‐volcanic tremor activity
Focal mechanisms reflect shearing on the subducting plate interface</description><subject>Earthquakes</subject><subject>low-frequency</subject><subject>mexico</subject><subject>Sciences of the Universe</subject><subject>Seismic activity</subject><subject>Seismic phenomena</subject><subject>Seismograms</subject><subject>slow-slip</subject><subject>Stacking</subject><subject>subduction</subject><subject>Sweets</subject><subject>tremor</subject><subject>Tremors</subject><subject>Waveforms</subject><issn>0094-8276</issn><issn>1944-8007</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2013</creationdate><recordtype>article</recordtype><recordid>eNp10D1PwzAQBmALgUT5GPgHkVgAKeVsx7E7IgQFKRRoQYyWk1xoSkhaO6HtvycQ6IDEdB6e17p7CTmi0KcA7PzVFn0BIqRbpEcHQeArALlNegCD9s1kuEv2nJsBAAdOe4RH1dLPLC4aLJO1h8bW00Vj3tB5eenVU_TucJUnpvQmS8Tam8yr-oDsZKZwePgz98nz9dXT5Y0f3Q9vLy8iPxEQUD9mzIg4zUxgYpNxHiNXmYnTlItBnCqGPI5DzhIpaCJlGiiKqcQUGFJFmUz4Pjnr_p2aQs9t_m7sWlcm1zcXkc5L12jgQlGp5Adt8UmH57Zqj3G1fs9dgkVhSqwap6mAkIdMwRc9_kNnVWPL9hRNw4ABU0EIrTrtVGIr5yxmmxUo6K-uddu1_u66teedXeYFrv-HejiOfhN-l8hdjatNwtg3HUouhX4ZDfXdePwID8NHPeKfbdaNrw</recordid><startdate>20130616</startdate><enddate>20130616</enddate><creator>Frank, William B.</creator><creator>Shapiro, Nikolaï M.</creator><creator>Kostoglodov, Vladimir</creator><creator>Husker, Allen L.</creator><creator>Campillo, Michel</creator><creator>Payero, Juan S.</creator><creator>Prieto, Germán A.</creator><general>Blackwell Publishing Ltd</general><general>John Wiley & Sons, Inc</general><general>American Geophysical Union</general><scope>BSCLL</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7TG</scope><scope>7TN</scope><scope>8FD</scope><scope>F1W</scope><scope>FR3</scope><scope>H8D</scope><scope>H96</scope><scope>KL.</scope><scope>KR7</scope><scope>L.G</scope><scope>L7M</scope><scope>7SM</scope><scope>1XC</scope><scope>VOOES</scope><orcidid>https://orcid.org/0000-0001-6971-4499</orcidid></search><sort><creationdate>20130616</creationdate><title>Low-frequency earthquakes in the Mexican Sweet Spot</title><author>Frank, William B. ; Shapiro, Nikolaï M. ; Kostoglodov, Vladimir ; Husker, Allen L. ; Campillo, Michel ; Payero, Juan S. ; Prieto, Germán A.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c5041-b22a5bdfa4abaf33be38fabdd359bd82e3bb632c751c77d481ed7ed02e18127c3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2013</creationdate><topic>Earthquakes</topic><topic>low-frequency</topic><topic>mexico</topic><topic>Sciences of the Universe</topic><topic>Seismic activity</topic><topic>Seismic phenomena</topic><topic>Seismograms</topic><topic>slow-slip</topic><topic>Stacking</topic><topic>subduction</topic><topic>Sweets</topic><topic>tremor</topic><topic>Tremors</topic><topic>Waveforms</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Frank, William B.</creatorcontrib><creatorcontrib>Shapiro, Nikolaï M.</creatorcontrib><creatorcontrib>Kostoglodov, Vladimir</creatorcontrib><creatorcontrib>Husker, Allen L.</creatorcontrib><creatorcontrib>Campillo, Michel</creatorcontrib><creatorcontrib>Payero, Juan S.</creatorcontrib><creatorcontrib>Prieto, Germán A.</creatorcontrib><collection>Istex</collection><collection>CrossRef</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Oceanic Abstracts</collection><collection>Technology Research Database</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Engineering Research Database</collection><collection>Aerospace Database</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy & Non-Living Resources</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><collection>Civil Engineering Abstracts</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>Earthquake Engineering Abstracts</collection><collection>Hyper Article en Ligne (HAL)</collection><collection>Hyper Article en Ligne (HAL) (Open Access)</collection><jtitle>Geophysical research letters</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Frank, William B.</au><au>Shapiro, Nikolaï M.</au><au>Kostoglodov, Vladimir</au><au>Husker, Allen L.</au><au>Campillo, Michel</au><au>Payero, Juan S.</au><au>Prieto, Germán A.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Low-frequency earthquakes in the Mexican Sweet Spot</atitle><jtitle>Geophysical research letters</jtitle><addtitle>Geophys. Res. Lett</addtitle><date>2013-06-16</date><risdate>2013</risdate><volume>40</volume><issue>11</issue><spage>2661</spage><epage>2666</epage><pages>2661-2666</pages><issn>0094-8276</issn><eissn>1944-8007</eissn><abstract>We use data from the Meso‐America Subduction Experiment to detect and locate low‐frequency earthquakes (LFEs) in the Mexican subduction zone. We use visually‐identified templates to perform a network waveform correlation search that produced ~17,000 robustly detected LFEs that form 15 distinct families. Stacking an LFE family's corresponding detections results in seismograms with high signal‐to‐noise ratios and clear P and S wave arrivals; we use these travel times to locate the sources. The resulting locations superpose a previously identified region of permanent non‐volcanic tremor (NVT) activity. Husker et al. (2012) called this region a Sweet Spot, suggesting that the local conditions are adequate to continuously generate NVT. The LFE hypocenters have been located at a depth of 40–45 km in an area that is surrounding the upper slab‐plate interface. We characterize their focal mechanisms by comparing their stacked seismograms to synthetic seismograms. This analysis reveals a common low‐dipping focal mechanism.
Key Points
Detected and characterized 15 low‐frequency earthquake families in Mexico
Sources locate to a region known for constant non‐volcanic tremor activity
Focal mechanisms reflect shearing on the subducting plate interface</abstract><cop>Washington</cop><pub>Blackwell Publishing Ltd</pub><doi>10.1002/grl.50561</doi><tpages>6</tpages><orcidid>https://orcid.org/0000-0001-6971-4499</orcidid><oa>free_for_read</oa></addata></record> |
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| ispartof | Geophysical research letters, 2013-06, Vol.40 (11), p.2661-2666 |
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| source | Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; Wiley Free Content; Wiley-Blackwell AGU Digital Library; Wiley Online Library All Journals |
| subjects | Earthquakes low-frequency mexico Sciences of the Universe Seismic activity Seismic phenomena Seismograms slow-slip Stacking subduction Sweets tremor Tremors Waveforms |
| title | Low-frequency earthquakes in the Mexican Sweet Spot |
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