Stephen Hernandez Tom Parsons Kris Pankow Aaron A. Velasco 2008 <p><span>Earthquakes can be triggered by local changes in the stress field (static triggering</span>^{<a id="ref-link-section-d22341e330" title="King, G. C. P., Stein, R. S. &amp; Lin, J. Static stress changes and the triggering of earthquakes. Bull. Seismol. Soc. Am. 84, 935–953 (1994)." href="https://www.nature.com/articles/ngeo204#ref-CR1" data-track="click" data-track-action="reference anchor" data-track-label="link" data-test="citation-ref" aria-label="Reference 1" data-mce-href="https://www.nature.com/articles/ngeo204#ref-CR1">1</a>,<a id="ref-link-section-d22341e333" title="Stein, R. S., King, G. C. P. &amp; Lin, J. Stress triggering of the 1994 M=6.7 Northridge, California, earthquake by its predecessors. Science 265, 1432–1435 (1994)." href="https://www.nature.com/articles/ngeo204#ref-CR2" data-track="click" data-track-action="reference anchor" data-track-label="link" data-test="citation-ref" aria-label="Reference 2" data-mce-href="https://www.nature.com/articles/ngeo204#ref-CR2">2</a>,<a id="ref-link-section-d22341e336" title="Harris, R. A., Simpson, R. W. &amp; Reasenberg, P. A. Influence of static stress changes on earthquake locations in southern California. Nature 375, 221–224 (1995)." href="https://www.nature.com/articles/ngeo204#ref-CR3" data-track="click" data-track-action="reference anchor" data-track-label="link" data-test="citation-ref" aria-label="Reference 3" data-mce-href="https://www.nature.com/articles/ngeo204#ref-CR3">3</a>,<a id="ref-link-section-d22341e339" title="Harris, R. A. &amp; Simpson, R. W. In the shadow of 1857—The effect of the great Ft. Tejon earthquake on subsequent earthquakes in southern California. Geophys. Res. Lett. 23, 229–232 (1996)." href="https://www.nature.com/articles/ngeo204#ref-CR4" data-track="click" data-track-action="reference anchor" data-track-label="link" data-test="citation-ref" aria-label="Reference 4" data-mce-href="https://www.nature.com/articles/ngeo204#ref-CR4">4</a>,<a id="ref-link-section-d22341e342" title="Harris, R. A. Introduction to special section: Stress triggers, stress shadows, and implications for seismic hazard. J. Geophys. Res. 103, 24347–24358 (1998)." href="https://www.nature.com/articles/ngeo204#ref-CR5" data-track="click" data-track-action="reference anchor" data-track-label="link" data-test="citation-ref" aria-label="Reference 5" data-mce-href="https://www.nature.com/articles/ngeo204#ref-CR5">5</a>,<a id="ref-link-section-d22341e345" title="Parsons, T. Global Omori law decay of triggered earthquakes: Large aftershocks outside the classical aftershock zone. J. Geophys. Res. 107, doi:10.1029/2001JB000646 (2002)." href="https://www.nature.com/articles/ngeo204#ref-CR6" data-track="click" data-track-action="reference anchor" data-track-label="link" data-test="citation-ref" aria-label="Reference 6" data-mce-href="https://www.nature.com/articles/ngeo204#ref-CR6">6</a>,<a id="ref-link-section-d22341e349" title="Lin, J. &amp; Stein, R. S. Stress triggering in thrust and subduction earthquakes and stress interaction between the southern San Andreas and nearby thrust and strike-slip faults. J. Geophys. Res. 109, doi:10.1029/2003JB002607 (2004)." href="https://www.nature.com/articles/ngeo204#ref-CR7" data-track="click" data-track-action="reference anchor" data-track-label="link" data-test="citation-ref" aria-label="Reference 7" data-mce-href="https://www.nature.com/articles/ngeo204#ref-CR7">7</a>}<span>) due to nearby earthquakes or by stresses caused by the passage of surface (Rayleigh and Love) waves from a remote, large earthquake (dynamic triggering</span>^{<a id="ref-link-section-d22341e353" title="West, M., Sanchez, J. J. &amp; McNutt, S. R. Periodically triggered seismicity at Mount Wrangell, Alaska, after the Sumatra earthquake. Science 308, 1144–1146 (2005)." href="https://www.nature.com/articles/ngeo204#ref-CR8" data-track="click" data-track-action="reference anchor" data-track-label="link" data-test="citation-ref" aria-label="Reference 8" data-mce-href="https://www.nature.com/articles/ngeo204#ref-CR8">8</a>,<a id="ref-link-section-d22341e356" title="Anderson, J. G. et al. Seismicity in the western Great Basin apparently triggered by the Landers, California earthquake, 28 June 1992. Bull. Seismol. Soc. Am. 84, 863–891 (1994)." href="https://www.nature.com/articles/ngeo204#ref-CR9" data-track="click" data-track-action="reference anchor" data-track-label="link" data-test="citation-ref" aria-label="Reference 9" data-mce-href="https://www.nature.com/articles/ngeo204#ref-CR9">9</a>,<a id="ref-link-section-d22341e359" title="Hill, D. P. et al. Seismicity in the western United States remotely triggered by the M 7.4 Landers, California, earthquake of June 28, 1992. Science 260, 1617–1623 (1993)." href="https://www.nature.com/articles/ngeo204#ref-CR10" data-track="click" data-track-action="reference anchor" data-track-label="link" data-test="citation-ref" aria-label="Reference 10" data-mce-href="https://www.nature.com/articles/ngeo204#ref-CR10">10</a>,<a id="ref-link-section-d22341e362" title="Brodsky, E. E., Karakostas, V. &amp; Kanamori, H. A new observation of dynamically triggered regional seismicity: earthquakes in Greece following the August, 1999 Izmit, Turkey earthquake. Geophys. Res. Lett. 27, 2741–2744 (2000)." href="https://www.nature.com/articles/ngeo204#ref-CR11" data-track="click" data-track-action="reference anchor" data-track-label="link" data-test="citation-ref" aria-label="Reference 11" data-mce-href="https://www.nature.com/articles/ngeo204#ref-CR11">11</a>,<a id="ref-link-section-d22341e365" title="Gomberg, J., Bodin, P., Larson, K. &amp; Dragert, H. Earthquake nucleation by transient deformations caused by the M=7.9 Denali, Alaska, earthquake. Nature 427, 621–624 (2004)." href="https://www.nature.com/articles/ngeo204#ref-CR12" data-track="click" data-track-action="reference anchor" data-track-label="link" data-test="citation-ref" aria-label="Reference 12" data-mce-href="https://www.nature.com/articles/ngeo204#ref-CR12">12</a>,<a id="ref-link-section-d22341e368" title="Pankow, K. L., Arabasz, W. J., Pechmann, J. C. &amp; Nava, S. J. Triggered seismicity in Utah from the November 3, 2002, Denali Fault earthquake. Bull. Seismol. Soc. Am. 94, S332–S347 (2004)." href="https://www.nature.com/articles/ngeo204#ref-CR13" data-track="click" data-track-action="reference anchor" data-track-label="link" data-test="citation-ref" aria-label="Reference 13" data-mce-href="https://www.nature.com/articles/ngeo204#ref-CR13">13</a>,<a id="ref-link-section-d22341e372" title="Prejean, S. G. et al. Remotely triggered seismicity on the United States west coast following the M 7.9 Denali Fault earthquake. Bull. Seismol. Soc. Am. 94, S348–S359 (2004)." href="https://www.nature.com/articles/ngeo204#ref-CR14" data-track="click" data-track-action="reference anchor" data-track-label="link" data-test="citation-ref" aria-label="Reference 14" data-mce-href="https://www.nature.com/articles/ngeo204#ref-CR14">14</a>,<a id="ref-link-section-d22341e375" title="Husen, S., Wiemer, S. &amp; Smith, R. B. Remotely triggered seismicity in the Yellowstone National Park region by the 2002 Mw=7.9 Denali Fault Earthquake, Alaska. Bull. Seismol. Soc. Am. 94, S317–S331 (2004)." href="https://www.nature.com/articles/ngeo204#ref-CR15" data-track="click" data-track-action="reference anchor" data-track-label="link" data-test="citation-ref" aria-label="Reference 15" data-mce-href="https://www.nature.com/articles/ngeo204#ref-CR15">15</a>,<a id="ref-link-section-d22341e378" title="Eberhart-Phillips, D. et al. The 2002 Denali fault earthquake, Alaska: A large magnitude, slip-partitioned event. Science 300, 1113–1118 (2003)." href="https://www.nature.com/articles/ngeo204#ref-CR16" data-track="click" data-track-action="reference anchor" data-track-label="link" data-test="citation-ref" aria-label="Reference 16" data-mce-href="https://www.nature.com/articles/ngeo204#ref-CR16">16</a>,<a id="ref-link-section-d22341e381" title="Husker, A. L. &amp; Brodsky, E. E. Seismicity in Idaho and Montana triggered by the Denali Fault Earthquake: A window into the geologic context for seismic triggering. Bull. Seismol. Soc. Am. 94, S310–S316 (2004)." href="https://www.nature.com/articles/ngeo204#ref-CR17" data-track="click" data-track-action="reference anchor" data-track-label="link" data-test="citation-ref" aria-label="Reference 17" data-mce-href="https://www.nature.com/articles/ngeo204#ref-CR17">17</a>,<a id="ref-link-section-d22341e384" title="Hill, D. P. Dynamic stresses, Coulomb failure, and remote triggering. Bull. Seismol. Soc. Am. 98, 66–92 (2008)." href="https://www.nature.com/articles/ngeo204#ref-CR18" data-track="click" data-track-action="reference anchor" data-track-label="link" data-test="citation-ref" aria-label="Reference 18" data-mce-href="https://www.nature.com/articles/ngeo204#ref-CR18">18</a>}<span>). However, the mechanism, frequency, controlling factors and the global extent of dynamic triggering are yet to be fully understood. Because Rayleigh waves involve compressional and dilatational particle motion (volumetric changes) as well as shearing, whereas Love waves only involve shearing, triggering by either wave type implies fundamentally different physical mechanisms. Here, we analyse broadband seismograms from over 500 globally distributed stations and use an automated approach to systematically identify small triggered earthquakes—the low-amplitude signals of such earthquakes would normally be masked by high-amplitude surface waves. Our analysis reveals that out of 15 earthquakes studied of magnitude (</span><i>M</i><span>) greater than 7.0 that occurred after 1990, 12 are associated with significant increases in the detection of smaller earthquakes during the passage of both the Love and Rayleigh waves. We conclude that dynamic triggering is a ubiquitous phenomenon that is independent of the tectonic environment of the main earthquake or the triggered&nbsp;event.</span></p> application/pdf 10.1038/ngeo204 en Springer Global ubiquity of dynamic earthquake triggering article