File Format

Geocode Information:

Datum: JGD2000

Pixel size: 7.5 arc-seconds in latitude and 11.25 arc-seconds in longitude (approx. 250 m × 250 m)

Peak Ground Acceleration (PGA):

Channel number: 1

Data type: 8-bit unsigned integer

Unit: DN [compensated digital number], PGA [cm/s/s] = 10 ^ (0.011858*DN+0.289172)

Invalid values: 0 (less than 2 cm/s/s), 255 (null)

Peak Ground Velocity (PGV):

Channel number: 1

Data type: 8-bit unsigned integer

Unit: DN [compensated digital number], PGV [cm/s] = 10 ^ (0.011677*DN-0.710647)

Invalid values: 0 (less than 0.2 cm/s), 255 (null)

JMA Instrumental Seismic Intensity (INT):

Channel number: 1

Data type: 8-bit unsigned integer

Unit: DN [compensated digital number], INT = 0.025692*DN+0.474308

Invalid values: 0 (less than 0.5), 255 (null)

Acceleration Response with 5% damping (SA):

Data type: CSV text

Value order: period [s], value of surface ground [cm/s/s/], value of stiff ground [cm/s/s], amplification factor

Liquefaction Potential (LIQ):

Channel number: 1

Data type: 8-bit unsigned integer

Unit: DN [compensated digital number], LIQ [%] = 10 ^ (0.010244*DN-1.0)

Invalid values: 0 (less than 0.1 %), 255 (null)