Migration of earthquakes with a small stress drop in the Tanzawa Mountains, Japan

Earth, Planets and Space

Table 1 Stress drops for the 16 earthquakes that were analyzed in this study

Origin time (UT)		Lat. (N)	Lon. (E)	Dep. (km)	M _W	Stress drop (MPa)^a
20030711	0523	35.501	139.099	21.1	4.1	102 (3.36–3120)	34.0 (1.63–710)
20030711	1731	35.500	139.099	21.7	4.1	99.1 (6.12–1600)	42.2 (1.31–1360)
20041108	1848	35.490	138.980	26.6	4.1	6.54 (0.317–135)	20.6 (1.33–320)
20050412	0409	35.493	138.957	24.5	4.1	37.7 (12.5–114)	42.3 (1.35–1320)
20050731	0553	35.553	138.961	22.4	4.4	11.6 (6.62–20.5)	50.0 (6.98–358)
20080715	1323	35.528	138.988	21.4	4.3	–	18.8 (6.24–56.9)
20090715	2019	35.420	139.006	15.7	4.2	–	114 (15.4–839)
20110130	2303	35.543	138.944	25.1	3.5	0.787 (0.00383–162)	0.510 (0.00740–35.1)
20120127	2239	35.492	138.979	17.8	4.9	20.4 (1.86–223)	63.6 (8.89–455)
20120127	2243	35.489	138.977	18.2	5.4	8.24 (4.00–17.0)	41.2 (6.40–265)
20120127	2245	35.488	138.973	19.7	3.8	0.215 (0.00333–13.9)	0.202 (0.0189–2.16)
20120127	2246	35.478	138.980	20.8	4.2	2.92 (0.292–29.2)	7.71 (1.86–32.0)
20120127	2304	35.497	138.980	17.9	4.2	1.84 (0.415–8.20)	2.67 (1.07–6.63)
20120129	0746	35.538	138.985	20.9	4.7	–	37.4 (8.15–172)
20120212	0151	35.481	138.950	19.4	3.6	2.92 (0.0606–141)	28.1 (0.624–1260)
20120623	1441	35.492	138.970	18.9	3.5	19.1 (3.96–91.7)	20.0 (0.646–620)

^aLeft and right values show stress drops estimated by P and S waves, respectively. Values in parentheses indicate the ranges for two standard deviations.