G-R Law

The error Function

Detected Mag. Freq.

V

P

×

Global data

10a bM�

Ogata and Katsura (1993, GJI)

1973-2014 1973-2012

2013-2014

1973-2012 2013-2014 1973-2014

x =

G-R Law

Error Function

Detected Mag. Freq.

V

P

10a bM�

b-value change

P�- value change

V�- value change

1988 - 2013

TIME (days)

TIME (days)

TIME (days)

TIME (years)

Ogata and Katsura (1993, GJI)

b-value change

P�- value change

V�- value change D

ete

ctio

n R

ate

D

ete

ctio

n R

ate

D

ete

ctio

n R

ate

1.5M t

1.0M t

0.5M t

TIME (days) TIME (days)

Smatra region Japan

Japan Japan

TIME (years)

Old JMA catalog MJ vs NEIC mb

NEIC mb vs ISC Mb vs JMA MJ

Ogata (1998, Zisin) Bansal & Ogata (2013, JGR)

MJMA(x,y) = MHINET + 'M (x,y)

MHINET=0.0 MHINET=1.0

MHINET=3.0

MHINET=2.0

MHINET=4.0 MHINET=5.0

Hi-net Magnitude

JM

A M

ag

nit

ud

e

Hi-net Magnitude

JM

A M

ag

nit

ud

e

Hi-net Magnitude

Ma

gn

itu

de

Dif

fere

nce

Magnitude Difference

On going joint work with Omi and colleagues of the NIED at Tsukuba

MJMA(x,y) = MHINET + 'M (x,y)

MHINET=0.0 MHINET=1.0

MHINET=3.0

MHINET=2.0

MHINET=4.0 MHINET=5.0

Hi-net Magnitude

JM

A M

ag

nit

ud

e

Hi-net Magnitude

JM

A M

ag

nit

ud

e

Hi-net Magnitude

Ma

gn

itu

de

Dif

fere

nce

Magnitude Difference

On going joint work with Omi and colleagues of the NIED at Tsukuba