scholarly journals Time-dependent modeling of slow slip events and associated seismicity and tremor at the Hikurangi subduction zone, New Zealand

2014 ◽  
Vol 119 (1) ◽  
pp. 734-753 ◽  
Author(s):  
Noel M. Bartlow ◽  
Laura M. Wallace ◽  
R. John Beavan ◽  
Stephen Bannister ◽  
P. Segall
Keyword(s):  
New Zealand ◽  
Subduction Zone ◽  
Time Dependent ◽  
Slow Slip ◽  
Slow Slip Events

Three‐Dimensional Modeling of Spontaneous and Triggered Slow‐Slip Events at the Hikurangi Subduction Zone, New Zealand

2019 ◽  
Vol 124 (12) ◽  
pp. 13250-13268 ◽  
Author(s):  
Bunichiro Shibazaki ◽  
Laura M. Wallace ◽  
Yoshihiro Kaneko ◽  
Ian Hamling ◽  
Yoshihiro Ito ◽  
...  
Keyword(s):  
New Zealand ◽  
Subduction Zone ◽  
Three Dimensional ◽  
Slow Slip ◽  
Slow Slip Events ◽  
Three Dimensional Modeling ◽  
Dimensional Modeling

Slow Slip Events in New Zealand

2020 ◽  
Vol 48 (1) ◽  
pp. 175-203 ◽  
Author(s):  
Laura M. Wallace
Keyword(s):  
New Zealand ◽  
Subduction Zone ◽  
Slow Motion ◽  
Plate Motion ◽  
Slow Slip ◽  
Slow Slip Events ◽  
Diverse Range ◽  
The North ◽  
Interseismic Coupling ◽  
Natural Laboratory

Continuously operating global positioning system sites in the North Island of New Zealand have revealed a diverse range of slow motion earthquakes on the Hikurangi subduction zone. These slow slip events (SSEs) exhibit diverse characteristics, from shallow (<15 km), short (<1 month), frequent (every 1–2 years) events in the northern part of the subduction zone to deep (>30 km), long (>1 year), less frequent (approximately every 5 years) SSEs in the southern part of the subduction zone. Hikurangi SSEs show intriguing relationships to interseismic coupling, seismicity, and tectonic tremor, and they exhibit a diversity of interactions with large, regional earthquakes. Due to the marked along-strike variations in Hikurangi SSE characteristics, which coincide with changes in physical characteristics of the subduction margin, the Hikurangi subduction zone presents a globally unique natural laboratory to resolve outstanding questions regarding the origin of episodic, slow fault slip behavior. ▪  New Zealand's Hikurangi subduction zone hosts slow slip events with a diverse range of depth, size, duration, and recurrence characteristics. ▪  Hikurangi slow slip events show intriguing relationships with seismicity ranging from small earthquakes and tremor to larger earthquakes. ▪  Slow slip events play a major role in the accommodation of plate motion at the Hikurangi subduction zone. ▪  Many aspects of the Hikurangi subduction zone make it an ideal natural laboratory to resolve the physical processes controlling slow slip.

scholarly journals Observations of Laboratory and Natural Slow Slip Events: Hikurangi Subduction Zone, New Zealand

2020 ◽  
Vol 21 (2) ◽  
Author(s):  
Matt J. Ikari ◽  
Laura M. Wallace ◽  
Hannah S. Rabinowitz ◽  
Heather M. Savage ◽  
Ian J. Hamling ◽  
...  
Keyword(s):  
New Zealand ◽  
Subduction Zone ◽  
Slow Slip ◽  
Slow Slip Events

Systematic characterization of slow slip events along the Mexican subduction zone from 2000 to 2019

2020 ◽  
Author(s):  
Mathilde Radiguet ◽  
Ekaterina Kazachkina ◽  
Louise Maubant ◽  
Nathalie Cotte ◽  
Vladimir Kostoglodov ◽  
...  
Keyword(s):  
Subduction Zone ◽  
Subduction Zones ◽  
Scaling Laws ◽  
Temporal Evolution ◽  
Seismic Gap ◽  
Slow Slip ◽  
Slow Slip Events ◽  
Grace Data ◽  
Spatio Temporal ◽  
Mexican Subduction Zone

&lt;p&gt;Slow slip events (SSEs) represent a significant mechanism of strain release along several subduction zones, and understanding their occurrence and relations with major earthquake asperities is essential for a comprehensive understanding of the seismic cycle. Here, we focus on the Mexican subduction zone, characterized by the occurrence of recurrent large slow slip events (SSEs), both in the Guerrero region, where the SSEs are among the largest observed worldwide, and in the Oaxaca region, where smaller, more frequent SSEs occur. Up to now, most slow slip studies in the Mexican subduction zone focused either on the detailed analysis of a single event, were limited to a small area (Guerrero or Oaxaca), or were limited to data before 2012 [e.g.1-4]. In this study, our aim is to build an updated and consistent catalog of major slow slip events in the Guerrero-Oaxaca region.&lt;/p&gt;&lt;p&gt;We use an approach similar to Michel et al. 2018 [5]. We analyze the GPS time series from 2000 to 2019 using Independent Component Analysis (ICA), in order to separate temporally varying sources of different origins (seasonal signals, SSEs and afterslip of major earthquakes). We are able to isolate a component corresponding to seasonal loading, which matches the temporal evolution of displacement modeled from the GRACE data. The sources (independent components) identified as tectonic sources of deep origin are inverted for slip on the subduction interface. We thus obtain a model of the spatio-temporal evolution of aseismic slip on the subduction interface over 19 years, from which we can isolate around 30 individual slow slip events of M&lt;sub&gt;w &lt;/sub&gt;&gt; 6.2.&lt;/p&gt;&lt;p&gt;&amp;#160;The obtained catalog is coherent with previous studies (in terms of number of events detected, magnitude and duration) which validates the methodology. The observed moment-duration scaling is close to M&lt;sub&gt;0&lt;/sub&gt;~T&lt;sup&gt;3 &lt;/sup&gt;as recently suggested by Michel [6] for Cascadia SSEs, and our study extends the range of magnitude considered in their analysis. Finally, we also investigate the spatio-temporal relations between the SSEs occurring in the adjacent regions of Guerrero and Oaxaca, and their interaction with local and distant earthquakes.&lt;/p&gt;&lt;p&gt;&amp;#160;&lt;/p&gt;&lt;p&gt;References:&lt;/p&gt;&lt;ol&gt;&lt;li&gt;Kostoglodov, V. et al. A large silent earthquake in the Guerrero seismic gap, Mexico. Geophys. Res. Lett &lt;strong&gt;30&lt;/strong&gt;, 1807 (2003).&lt;/li&gt; &lt;li&gt;Graham, S. et al. Slow Slip History for the Mexico Subduction Zone: 2005 Through 2011. Pure and Applied Geophysics 1&amp;#8211;21 (2015). doi:10.1007/s00024-015-1211-x&lt;/li&gt; &lt;li&gt;Larson, K. M., Kostoglodov, V. &amp; Shin&amp;#8217;ichi Miyazaki, J. A. S. The 2006 aseismic slow slip event in Guerrero, Mexico: New results from GPS. Geophys. Res. Lett. &lt;strong&gt;34&lt;/strong&gt;, L13309 (2007).&lt;/li&gt; &lt;li&gt;Radiguet, M. et al. Slow slip events and strain accumulation in the Guerrero gap, Mexico. J. Geophys. Res. &lt;strong&gt;117&lt;/strong&gt;, B04305 (2012).&lt;/li&gt; &lt;li&gt;Michel, S., Gualandi, A. &amp; Avouac, J.-P. Interseismic Coupling and Slow Slip Events on the Cascadia Megathrust. Pure Appl. Geophys. (2018). doi:10.1007/s00024-018-1991-x&lt;/li&gt; &lt;li&gt;Michel, S., Gualandi, A. &amp; Avouac, J. Similar scaling laws for earthquakes and Cascadia slow-slip events. Nature &lt;strong&gt;574, &lt;/strong&gt;522&amp;#8211;526 (2019) doi:10.1038/s41586-019-1673-6&lt;/li&gt; &lt;/ol&gt;&lt;p&gt;&amp;#160;&lt;/p&gt;

scholarly journals Slow slip near the trench at the Hikurangi subduction zone, New Zealand

Science ◽  
2016 ◽  
Vol 352 (6286) ◽  
pp. 701-704 ◽  
Author(s):  
L. M. Wallace ◽  
S. C. Webb ◽  
Y. Ito ◽  
K. Mochizuki ◽  
R. Hino ◽  
...  
Keyword(s):  
New Zealand ◽  
Subduction Zone ◽  
Slow Slip
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