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Table 1 Radiocarbon dates of samples from the trench

From: Repeated triggered ruptures on a distributed secondary fault system: an example from the 2016 Kumamoto earthquake, southwest Japan

Sample No Labo No Sample position (unit No.) Grid No Depth from 0 m grid [m] Material δ13C [‰] Conventional 14C age [yrBP] Calibrated age (2σ) [calBP]
1 IAAA-171171 10 W4.15 0.24 Organic sediments − 11.43 ± 0.48 1,180 ± 20 1180–1050 (95.4%)
2 IAAA-171170 Top of 40 W5.65 0.57 Organic sediments − 13.64 ± 0.38 1,900 ± 20 1900–1810 (95.2%), 1760–1740 (0.2%)
3 IAAA-171454 Bottom of 40 W5.65 0.86 Organic sediments − 12.29 ± 0.39 2,070 ± 20 2120–1990 (95.4%)
4 IAAA-171453 Top of 60 W5.65 1.04 Organic sediments − 13.83 ± 0.45 2,620 ± 30 2780–2720 (95.4%)
5 IAAA-171169 Bottom of 60 W5.65 1.18 Organic sediments − 9.50 ± 0.30 2,640 ± 20 2780–2740 (95.4%)
6 IAAA-171172 80 E8.05–8.10 1.85–1.90 Charcoals − 12.00 ± 0.47 2,990 ± 20 3230–3070 (95.4%)
7 IAAA-171509 80 E7.98 1.83 Organic sediments − 12.69 ± 0.34 3,010 ± 20 3330–3300 (5.9%), 3260–3140 (88.0%), 3100–3080 (1.5%)
8 IAAA-151561 Bottom of 101 N3.9 2.27 Charcoals − 24.47 ± 0.33 3,070 ± 20 3360–3220 (95.4%)