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

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

Subduction zone Backarc anomaly Forearc or trench-close anomaly References
Depth (km) Attenuation Vp/Vs Depth (km) Attenuation Vp/Vs
f range (Hz) P wave S wave f range (Hz) P wave S wave
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)