Testing determinations of Thellier paleointensities on 1962 and 1983 lava flows and scoriae in Miyakejima, Japan

Earth, Planets and Space

Table 1 Summary of Thellier paleointensity results for 1962 and 1983 lava flows and scoriae in Miyakejima, Japan

Age	Material	Site	lat.(°N)	lon.(°E)	Pass rate		\(B_a\) (\(\mu\)T)	\(\sigma\)(%)	\(\Delta (\%)\)
Age	Material	Site	lat.(°N)	lon.(°E)	Clinker or scoria	Lava interior	\(B_a\) (\(\mu\)T)	\(\sigma\)(%)	\(\Delta (\%)\)
1983	Lava flow	my07	34.074453	139.508991	9/12	0/10	49.1 ± 4.7	9.6
1983	Lava flow	my11	34.060768	139.499107	6/9	0/4	47.9 ± 4.7	9.8
1983	Lava flow	my10	34.051535	139.492885	4/8	1/4	41.8 ± 4.1	9.9
1983	Scoria	my15	34.062000	139.482678	4/6	—	47.7 ± 2.2	4.6
1983							46.6 ± 3.3		+3.3
1962	Lava flow	my03	34.096662	139.563913	2/4	3/8	43.0 ± 4.0	9.3
1962	Scoria	my12	34.096764	139.559096	5/6	—	42.7 ± 5.8	13.5
1962							43.0		−4.9
total					30/45	4/26

Pass rates are based on modified TTA and curvature criteria (Leonhardt et al. 2004; Paterson et al. 2014). \(B_a\), \(\sigma\) and \(\Delta\) denote paleointensity averages ± standard deviations, standard deviations in percent for each site, and differences from expected field intensities in percent for 1983 and 1962, respectively. The expected field intensities of 1962 and 1983 are 45.2 and 45.1 \(\mu\)T, respectively