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Table 2 List of search parameters in this study. Value ranges are used in inversion

From: Characterized source model of the M7.3 2016 Kumamoto earthquake by the 3D reciprocity GFs inversion with special reference to the velocity pulse at KMMH16

Name

Parameter description

Value

Vra

Rupture velocity in SMGA

2.0–3.0 km/s

Vrb

Background rupture velocity (velocity between adjacent rupture initiation points)

1.0–3.0 km/s

Rake

Rake angle. Strike and dip angles are defined by the fault segment

centered to − 180 deg

Tr

Rise time

fixed to half of rupture time across SMGA

Tp

Peak delay time, see Fig. 4

0.3–2.0 s

Hr

Relative amplitude of long triangle, see Fig. 4

fixed to 0.1

lgMo

Decimal logarithm of seismic moment, Nm

17.5–18.5

Sa

SMGA area

fixed to Somei et al. 2019

Lcent

Center of SMGA in strike direction (from reference point of segment)

3.6–8.4 km

Hcent

Center of SMGA in dip direction (from reference point of segment)

3.6–14.3 km

Lhypo

SMGA hypocenter location in strike direction (from reference point of segment)

0.9–9.3 km

Hhypo

SMGA hypocenter location in dip direction (from reference point of segment)

2.9–17.0 km

tHypo

SMGA hypocenter time

Calculated as Rhypo/Vrb