Tidal Response in Shallow Tectonic Tremors

S. Katakami, Y. Yamashita, H. Yakihara, Hiroshi Shimizu, Y. Ito, K. Ohta

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Various types of slow earthquakes (e.g., tectonic tremors and slow slip events) have been reported in tectonic zones, especially in the subduction zone. The tidal response of a tremor is considered to be strongly related to the weak friction state of the plate interface, and many studies have reported observational evidence of such correlation between tides and deep tremor activity. Here we used the modified frequency scanning method at a single station to detect micro tectonic tremors that have not been previously reported in southern Kyushu. In the early stage of the tremor activity, tremors are mostly modulated by slow slip events. In contrast, we found a seismic response to ocean tides during the later stage in the shallower part of the subduction zone. This might indicate that the tremors are triggered by tidal changes caused by fault weakening due to slow slip events as same as deeper condition.

Original languageEnglish
Pages (from-to)9699-9706
Number of pages8
JournalGeophysical Research Letters
Volume44
Issue number19
DOIs
Publication statusPublished - Oct 16 2017

Fingerprint

tremors
tectonics
subduction zone
ocean tide
seismic response
slip
tides
tide
friction
earthquake
frequency scanning
oceans
earthquakes
stations

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Earth and Planetary Sciences(all)

Cite this

Katakami, S., Yamashita, Y., Yakihara, H., Shimizu, H., Ito, Y., & Ohta, K. (2017). Tidal Response in Shallow Tectonic Tremors. Geophysical Research Letters, 44(19), 9699-9706. https://doi.org/10.1002/2017GL074060

Tidal Response in Shallow Tectonic Tremors. / Katakami, S.; Yamashita, Y.; Yakihara, H.; Shimizu, Hiroshi; Ito, Y.; Ohta, K.

In: Geophysical Research Letters, Vol. 44, No. 19, 16.10.2017, p. 9699-9706.

Research output: Contribution to journalArticle

Katakami, S, Yamashita, Y, Yakihara, H, Shimizu, H, Ito, Y & Ohta, K 2017, 'Tidal Response in Shallow Tectonic Tremors', Geophysical Research Letters, vol. 44, no. 19, pp. 9699-9706. https://doi.org/10.1002/2017GL074060
Katakami S, Yamashita Y, Yakihara H, Shimizu H, Ito Y, Ohta K. Tidal Response in Shallow Tectonic Tremors. Geophysical Research Letters. 2017 Oct 16;44(19):9699-9706. https://doi.org/10.1002/2017GL074060
Katakami, S. ; Yamashita, Y. ; Yakihara, H. ; Shimizu, Hiroshi ; Ito, Y. ; Ohta, K. / Tidal Response in Shallow Tectonic Tremors. In: Geophysical Research Letters. 2017 ; Vol. 44, No. 19. pp. 9699-9706.
@article{4bba0474ab2343c8abefa52aae4b5e33,
title = "Tidal Response in Shallow Tectonic Tremors",
abstract = "Various types of slow earthquakes (e.g., tectonic tremors and slow slip events) have been reported in tectonic zones, especially in the subduction zone. The tidal response of a tremor is considered to be strongly related to the weak friction state of the plate interface, and many studies have reported observational evidence of such correlation between tides and deep tremor activity. Here we used the modified frequency scanning method at a single station to detect micro tectonic tremors that have not been previously reported in southern Kyushu. In the early stage of the tremor activity, tremors are mostly modulated by slow slip events. In contrast, we found a seismic response to ocean tides during the later stage in the shallower part of the subduction zone. This might indicate that the tremors are triggered by tidal changes caused by fault weakening due to slow slip events as same as deeper condition.",
author = "S. Katakami and Y. Yamashita and H. Yakihara and Hiroshi Shimizu and Y. Ito and K. Ohta",
year = "2017",
month = "10",
day = "16",
doi = "10.1002/2017GL074060",
language = "English",
volume = "44",
pages = "9699--9706",
journal = "Geophysical Research Letters",
issn = "0094-8276",
publisher = "American Geophysical Union",
number = "19",

}

TY - JOUR

T1 - Tidal Response in Shallow Tectonic Tremors

AU - Katakami, S.

AU - Yamashita, Y.

AU - Yakihara, H.

AU - Shimizu, Hiroshi

AU - Ito, Y.

AU - Ohta, K.

PY - 2017/10/16

Y1 - 2017/10/16

N2 - Various types of slow earthquakes (e.g., tectonic tremors and slow slip events) have been reported in tectonic zones, especially in the subduction zone. The tidal response of a tremor is considered to be strongly related to the weak friction state of the plate interface, and many studies have reported observational evidence of such correlation between tides and deep tremor activity. Here we used the modified frequency scanning method at a single station to detect micro tectonic tremors that have not been previously reported in southern Kyushu. In the early stage of the tremor activity, tremors are mostly modulated by slow slip events. In contrast, we found a seismic response to ocean tides during the later stage in the shallower part of the subduction zone. This might indicate that the tremors are triggered by tidal changes caused by fault weakening due to slow slip events as same as deeper condition.

AB - Various types of slow earthquakes (e.g., tectonic tremors and slow slip events) have been reported in tectonic zones, especially in the subduction zone. The tidal response of a tremor is considered to be strongly related to the weak friction state of the plate interface, and many studies have reported observational evidence of such correlation between tides and deep tremor activity. Here we used the modified frequency scanning method at a single station to detect micro tectonic tremors that have not been previously reported in southern Kyushu. In the early stage of the tremor activity, tremors are mostly modulated by slow slip events. In contrast, we found a seismic response to ocean tides during the later stage in the shallower part of the subduction zone. This might indicate that the tremors are triggered by tidal changes caused by fault weakening due to slow slip events as same as deeper condition.

UR - http://www.scopus.com/inward/record.url?scp=85031317985&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85031317985&partnerID=8YFLogxK

U2 - 10.1002/2017GL074060

DO - 10.1002/2017GL074060

M3 - Article

AN - SCOPUS:85031317985

VL - 44

SP - 9699

EP - 9706

JO - Geophysical Research Letters

JF - Geophysical Research Letters

SN - 0094-8276

IS - 19

ER -