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 language | English |
|---|---|
| Pages (from-to) | 9699-9706 |
| Number of pages | 8 |
| Journal | Geophysical Research Letters |
| Volume | 44 |
| Issue number | 19 |
| DOIs | |
| Publication status | Published - Oct 16 2017 |
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All Science Journal Classification (ASJC) codes
- Geophysics
- Earth and Planetary Sciences(all)
Cite this
Tidal Response in Shallow Tectonic Tremors. / Katakami, S.; Yamashita, Y.; Yakihara, H.; Shimizu, H.; Ito, Y.; Ohta, K.
In: Geophysical Research Letters, Vol. 44, No. 19, 16.10.2017, p. 9699-9706.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Tidal Response in Shallow Tectonic Tremors
AU - Katakami, S.
AU - Yamashita, Y.
AU - Yakihara, H.
AU - Shimizu, H.
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.
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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 -