Tab. 5.3 - Magnitude determination in the input PEC (1440-1899).
PEC
|
Determination procedures (declared or inferred) |
MUS94 |
ML = 1.03 log A3 - 0.19
where A3 is the area enclosed in the isoseismal of 3° MSK |
HOU92 |
The introduction to the catalogue states that in many cases it comes from
the relation
M = 2/3 Io + 1
Actually M, when given, is declared as taken from a given source |
VGL91 |
M taken from the input PEC used by Van Gils and Leydecker, 1991 |
LEY86 |
no magnitude determination |
GRU88 |
Events without depth determination
M = 0.63 Io + 0.5 Events with depth determination M = 0.5 Io + Log h + 0.5 |
POS85 |
Earthquakes without depth determination
M = 0.53 Io + 0.95 Nord of 44° N M = 0.51 Io +1.0 South of 44° N Earthquakes with depth determination: M = 0.051 Io +Log h +0.35 |
RIB82 |
M = 0.66 Io + 1.7 Log h - 1.6 (1)
The relation which is found fitting the values of Mm/Io
|
HER95 |
Magnitudes are taken from other catalogues
Earthquakes without depth fit in the equation
|
ZSA88 |
M = 0.6 Io + 1.8 log h - 1.0
(1)
Figures for earthquakes without depth correspond to the relation
|
COM82 |
Magnitudes values of earthquakes without depth fit in the relation: |
SUK75 |
no magnitude determination |
PAP89 |
2 relationships declared:
I = 6.59 + 1.18 Ms - 4.50 log( D+17) for shallow events (1) I = 1.87 + 1.69 Ms - 3.94 log (D+30) for intermediate events (2)
As this are attenuation relations, |
SHA74 |
no magnitude determination |
AHU9 |
Varied relationships for different zones:
1) Ma = 0.69 Io + 1.78 log ha - 1.33 Bath 2) M = -1.33 + 1.78 log10R - 0.89l og(102(Io-2)/ü - 1) + 0.61Io Husebye 3) M = 2.7 + logS Ananin, Panasenko 4) MM (UP) = 0.38 + 1.14 log ri + 0.23 Io Wahlstrom, Ahjos 5) ML(A3) = - 0.5 + log10 (A3) ML(A4) = - 0.1 + log10 (A4) Hvskov, Optun 6) MS = -0.36 + 1.00 log A (3) MS = 0.91 + 0.82 log A (4) Bungum 7) MS = 0.95 + 0.69 log A (3) + 0.0006 (A3) 8) MS = 1.57 + 0.63 log A (4) + 0.0007 (A4) Wood, Woo the adopted formula is not reported in the catalogue entries |
LAA96 |
no magnitude determination |
MEM83 |
no magnitude determination |
KSH82 |
Used the following relationships for constructing nomograms (see Shebalin,
1974) by means of which all macroseismic magnitudes were determined: Ii = bM - n log ( D2 + h2)1/2 Io = bM - n log h + c Io = Ii - n log (1 + D2/h2)1/2 |
LAB95 |
1) M = 0.55 Io + 0.95
W. Carpathians
Karnik
2) M = 0.55 Io + 0.93 log (h) + 0.14 W. Carpathians Karnik 3) M = 0.70 Io - 0.1 E. Alps Karnik 4) M = 0.67 Io + 2.67 log (h) - 2.57 E. Alps Drimmel 5) M = 0.60 Io + 1.80 log (h) - 1.0 Pannonian Basin Zsiros the adopted relation is mentioned at each entry with the parameter Cm |
GRA78 |
makes use of the I, M, h relation from the sub-region of SHA74
similar to KSH82 |
PAJ72 |
Earthquakes with depth determination
M = 0.5 Io + log h + 0.35 Earthquakes without depth determination M = 0.63 Io + 0.5 |