Geophysical assessment of migration and storage conditions of fluids in subduction zones

Earth, Planets and Space

Table 2 Location, highest seismic wave attenuation values, and wave velocity ratios of mantle wedge seismic anomalies

Subduction zone	Backarc anomaly					Forearc or trench-close anomaly					References
	Depth (km)	Attenuation			V_p/V_s	Depth (km)	Attenuation			V_p/V_s
	Depth (km)	f range (Hz)	P wave	S wave	V_p/V_s	Depth (km)	f range (Hz)	P wave	S wave	V_p/V_s
1. Mariana	50-75	0.10-9.5	93-132	63-76	-	25-50	0.10-9.5	63-93	42-56	-	Pozgay et al. (2009); Wiens et al. (2006)
2. Tonga-Lau	50-70	0.10-3.5	47-60	15-30	1.70	<20	-	-	-	?	Wiens et al. (2008)
3. NE Japan	30-100	1.0-8.0	-	70-120	1.85	<25	-	-	-	1.85	Zhao et al. (2007); Takanami et al. (2000)
4. Honshu, Japan	80-100	1.0-20?	150	-	-	30-60	1.0-20?	150-180	-	-	Tsumura et al. (2000)
5. Taiwan	60-80	0.15-8.0	100	-	-	-	-	-	-	-	Ko et al. (2012)
6. Central Java, Indonesia	70-120	1.0-20	100	-	-	30-50	1.0-20	<100	-	-	Bohm et al. (2013)
7. North New Zealand	40-100	2.0-40	50-120	-	-	<25	2.0-40	120-200	-	-	Eberhart-Phillips et al. (2008)
8. Mexico	40 and 80-120	1.0-30	130	-	-	20	1.0-30	160	-	-	Chen and Clayton (2009)
9. Nicaragua-Costa Rica	40-75	0.50-7.0	90-140	120-160	1.90	<50	0.50-7.0	125-200	125-200	1.90	Rychert et al. (2008); Dinc et al. (2011)
10. Central Andes −21, −22.1°S	50-150	1.0-7.0; 1.0-30	117	-	1.83	<60	1.0-7.0; 1.0-30	117	-	-	Myers et al. (1998); Schurr et al. (2003)
11. Central Andes −24.2°S	150-200	1.0-7.0; 1.0-30	105	-	-	30-100	1.0-7.0; 1.0-30	95	-	-	Schurr et al. (2003)
12. Alaska	80-100	1-19; 0.3-9	537	283	-	50-60	1-19; 0.3-9	<537	<283	-	Stachnik et al. (2004)