A tsunami magnitude Mt was estimated for the
06-23-2001 Peru tsunami from far-field data.

A formula is Mt = log H + B
(Ref. Abe, K., JGR, 84, 1561, 1979)

             H(max. amp.)  n    B     Mt
California   0.09m         10   9.3   8.3
Aleutians    0.06m          7   9.3   8.1
Japan        0.15m         26   9.1   8.3
Hilo         0.40m          1   8.5   8.1
Honolulu     0.06m          1   9.3   8.1

H is the average of maximum amplitude and n is
the number of stations.  The average of Mt is
8.18.  Thus Mt is 8.2.  This value is close to
Ms=7.9 of the USGS QED and Mw=8.0-8.1.  I think
that the Peru event is not a "tsunami earthquake".

                         Katsuyuki Abe
                         ERI, Tokyo Univ.