Interval modulation of recurrent slow slip events by two types of earthquake loading

Mitsui, Yuta

doi:10.1186/s40623-015-0230-2

Cited by 7 publications

(6 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Whether this shortening is mostly due to the 2011 M w 9.0 Tohoku‐Oki earthquake and more particularly its postseismic slip [ Hirose et al , ], or to a much longer process taking place over years and independent of the 2011 shock, is unknown. Ozawa [] suggested that it could indeed mark the nearing of the end of a slip cycle in the Sagami Trough, as confirmed by friction models [e.g., Mitsui , ].…”

Section: Long‐term Accelerationmentioning

confidence: 99%

Background seismicity in Boso Peninsula, Japan: Long‐term acceleration, and relationship with slow slip events

Reverso

Marsan

Helmstetter

et al. 2016

Geophysical Research Letters

View full text Add to dashboard Cite

Slow slip events (SSEs) in subduction zones can trigger earthquake swarms, especially at shallow depth. The monitoring of seismicity rates has therefore the potential to help detect and characterize SSEs, and transient changes in coupling. However, the relationship between seismicity rate and slow slip rate during a SSE is unknown and made complicated by aftershock triggering within the swarm. Here we propose to complement geodetic methods with an objective measure of the seismicity rate that is directly associated with changes in slip rate. We show that this measure, applied to known occurrences of SSEs in the Boso area, Japan, yields an estimate, albeit indirect, of their seismic moment, hence their slip rate. We finally prove that the background rate in Boso has been accelerating since 1990; this explains previous observations of the shortening of the recurrence time between SSEs in Boso, that clearly predate the 2011 Mw9.0 Tohoku‐Oki earthquake.

show abstract

Section: Long‐term Accelerationmentioning

confidence: 99%

Background seismicity in Boso Peninsula, Japan: Long‐term acceleration, and relationship with slow slip events

Reverso

Marsan

Helmstetter

et al. 2016

Geophysical Research Letters

View full text Add to dashboard Cite

show abstract

“…It has been suggested that repeated slow earthquakes such as SST may trigger megathrust earthquakes due to frequent stress loading on the adjacent locked seismogenic zone (Obara and Kato 2016;Voss et al 2018). Numerical simulations have established that recurrence intervals of short-term slow slip events (S-SSEs) temporally decreased from 0.6-2 to 0.2-0.6 years towards a next megathrust earthquake, whereas those after the megathrust earthquake increased to 0.6-2 years due to stress perturbations from the megathrust rupture (Matsuzawa et al 2010;Mitsui 2015;Luo and Liu 2019). A recent geodetic study in the Nankai subduction zone revealed that the recurrence interval of S-SSEs from 1969 to 2012 may have decreased from > 5 years to ~ 1 year (Kano and Kano 2019).…”

Section: Introductionmentioning

confidence: 99%

Spatial changes in inclusion band spacing as an indicator of temporal changes in slow slip and tremor recurrence intervals

Nishiyama

Ujiie

Kano

2021

Earth Planets Space

View full text Add to dashboard Cite

Slow slip and tremor (SST) downdip of the seismogenic zones may trigger megathrust earthquakes by frequently transferring stress to seismogenic zones. Geodetic observations have suggested that the recurrence intervals of slow slip decrease toward the next megathrust earthquake. However, temporal variations in the recurrence intervals of SST during megathrust earthquake cycles remain poorly understood because of the limited duration of geodetic and seismological monitoring of slow earthquakes. The quartz-filled, crack-seal shear veins in the subduction mélange deformed near the downdip limit of the seismogenic zone in warm-slab environments record cyclic changes in the inclusion band spacing in the range from 4 ± 1 to 65 ± 18 μm. The two-phase primary fluid inclusions in quartz between inclusion bands exhibit varying vapor/liquid ratios regardless of inclusion band spacing, suggesting a common occurrence of fast quartz sealing due to a rapid decrease in quartz solubility associated with a large fluid pressure reduction. A kinetic model of quartz precipitation, considering a large fluid pressure change and inclusion band spacing, indicates that the sealing time during a single crack-seal event cyclically decreased and increased in the range from 0.16 ± 0.04 to 2.7 ± 0.8 years, with one cycle lasting at least 27 ± 2 to 93 ± 5 years. The ranges of sealing time and duration of a cycle may be comparable to the recurrence intervals of SST and megathrust earthquakes, respectively. We suggest that the spatial change in inclusion band spacing is a potential geological indicator of temporal changes in SST recurrence intervals, particularly when large fluid pressure reduction occurs by brittle fracturing.

show abstract

“…Magma injection is very unlikely too. Furthermore, numerical friction models have shown that the recurrence intervals of SSEs could become shorter when a large interplate earthquake is about to occur nearby (Matsuzawa et al, ; Mitsui, ). It is thus necessary to better constrain the slip history of this area for seismic risk mitigation.…”

Section: Introductionmentioning

confidence: 99%

Revisiting Slow Slip Events Occurrence in Boso Peninsula, Japan, Combining GPS Data and Repeating Earthquakes Analysis

et al. 2018

View full text Add to dashboard Cite

Slow slip events (SSEs) regularly occur near the Boso Peninsula, central Japan. Their time of recurrence has been decreasing from 6.4 to 2.2 years from 1996 to 2014. It is important to better constrain the slip history of this area, especially as models show that the recurrence intervals could become shorter prior to the occurrence of a large interplate earthquake nearby. We analyze the seismic waveforms of more than 2,900 events (M≥1.0) taking place in the Boso Peninsula, Japan, from 1 April 2004 to 4 November 2015, calculating the correlation and the coherence between each pair of events in order to define groups of repeating earthquakes. The cumulative number of repeating earthquakes suggests the existence of two slow slip events that have escaped detection so far. Small transient displacements observed in the time series of nearby GPS stations confirm these results. The detection scheme coupling repeating earthquakes and GPS analysis allow to detect small SSEs that were not seen before by classical methods. This work brings new information on the diversity of SSEs and demonstrates that the SSEs in Boso area present a more complex history than previously considered.

show abstract

Interval modulation of recurrent slow slip events by two types of earthquake loading

Cited by 7 publications

References 34 publications

Background seismicity in Boso Peninsula, Japan: Long‐term acceleration, and relationship with slow slip events

Background seismicity in Boso Peninsula, Japan: Long‐term acceleration, and relationship with slow slip events

Spatial changes in inclusion band spacing as an indicator of temporal changes in slow slip and tremor recurrence intervals

Revisiting Slow Slip Events Occurrence in Boso Peninsula, Japan, Combining GPS Data and Repeating Earthquakes Analysis

Contact Info

Product

Resources

About