MANUAL Location - Area: Francia , magnitude (ML): 0.8
2025-11-20 03:08:33 (UTC)

Regional Seismic Network of Northwestern Italy (Distav, University of Genoa)
Posted on: 2025-11-20 08:05:29

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Earthquake info - Manual location
Event - ID :251120030814
Magnitude (ML) :0.8 +/- 0.2
Origin Time :2025-11-20 03:08:33.587 (UTC)
Location : Latitude: 45.153 N, Longitude: 6.526 E
Area :Francia
Depth (km) :11.12
Distances (km) : 16.1 --- Bardonecchia
27.6 --- Oulx
29.5 --- Claviere
29.6 --- Salbertrand
29.7 --- Sauze d Oulx
30.6 --- Cesana Torinese
32.3 --- Exilles
35.2 --- Sestriere
35.4 --- Sauze di Cesana
36.1 --- Pragelato
36.4 --- Chiomonte
36.4 --- Moncenisio
38.0 --- Venaus
38.4 --- Giaglione
38.7 --- Novalesa
39.0 --- Gravere
40.2 --- Mompantero
41.1 --- Usseaux
41.3 --- Susa
42.8 --- Meana di Susa

Quality location estimate: Erh: 1.5 km, Erz: 1.6 km, Nf: 22, Gap: 189 °, Rms: 0.18


Manual location results
Station Net P arrival time P pick
err
P pick
weight
P res Nll
weight
S arrival time S pick
err
S pick
weight
S res Nll
weight
Dist.
OGMOFR2025-11-20 03:08:37.2600.01000.041.582025-11-20 03:08:39.6100.0531-0.111.6617.7
RRLGU2025-11-20 03:08:40.5200.02310.001.752025-11-20 03:08:45.4540.11030.071.3235.7
OGAGFR2025-11-20 03:08:41.4600.0703-0.051.712025-11-20 03:08:47.0900.1283-0.101.3842.5
RSPGU2025-11-20 03:08:44.4010.0200-0.071.672025-11-20 03:08:52.4550.04000.400.4459.3
LSDGU2025-11-20 03:08:44.4200.0301-0.231.122025-11-20 03:08:50.6800.1835-1.590.0760.0
RSLFR2025-11-20 03:08:43.9050.0200-0.860.082025-11-20 03:08:51.0590.0400-1.390.0861.0
BHBGU2025-11-20 03:08:46.0940.0200-0.161.432025-11-20 03:08:54.5200.2807-0.530.5568.9
LATOIV2025-11-20 03:08:47.4470.02000.121.172025-11-20 03:08:56.4310.0400-0.420.6475.9
SURFFR2025-11-20 03:08:47.6030.0200-0.280.952025-11-20 03:08:58.6800.23760.340.6978.9
MRGEIV2025-11-20 03:08:48.3600.0200-0.051.542025-11-20 03:08:59.0080.04000.450.4681.3
PZZGU2025-11-20 03:08:48.9260.0200-0.031.522025-11-20 03:09:00.8060.04000.740.1886.5


Local magnitude (ML) calculation results
Station Net Channels Stat. Mag. Wood-And.
Ampl.
Dist. (km) Azimuth
RRL GUHH0.874.43e-235.7141
OGAG FRHH0.915.22e-242.5178
RSP GUHH0.651.53e-259.390
LSD GUHH0.631.34e-260.054
BHB GUHH0.691.03e-268.9121
MRGE IVHH0.514.44e-381.331
PZZ GUHH1.143.26e-286.5147


Results of PGA, PGV, IH, spectral amplitudes (SA) values calculation
Station Net Channel PGA
(g)
PGV
(m/s)
IH 0*
(m)
IH 1*
(m)
IH 2*
(m)
Sa(T=0.10)
(g)
Sa(T=0.30)
(g)
Sa(T=1.00)
(g)
Sa(T=3.00)
(g)
Dist.
(km)
Azim.
(°)
RRL GUHHZ1.1848e-62.7586e-71.9516e-78.3992e-82.9050e-84.0836e-69.2790e-74.3584e-86.7191e-935.7141
RRL GUHHN1.9778e-64.4657e-74.1257e-71.6605e-77.8986e-86.9067e-61.9902e-61.1216e-71.3374e-835.7141
RRL GUHHE1.5709e-64.3597e-73.1166e-71.0206e-74.6661e-85.1987e-61.5694e-67.1273e-89.2802e-935.7141
OGAG FRHHZ9.5465e-72.4156e-71.9700e-78.7068e-83.8288e-83.2143e-61.3336e-64.8125e-86.0660e-942.5178
OGAG FRHHN1.2065e-64.3969e-73.5671e-71.7492e-79.3958e-83.0421e-62.6160e-61.3397e-71.6135e-842.5178
OGAG FRHHE8.8132e-73.3765e-73.3429e-72.6905e-71.1271e-71.6781e-61.5390e-61.3327e-71.3867e-842.5178
RSP GUHHZ9.1998e-71.2207e-76.6883e-82.6165e-81.3677e-81.7909e-63.5129e-71.8730e-83.5356e-959.390
RSP GUHHN1.6109e-62.0180e-79.7905e-83.6053e-81.9843e-84.2779e-65.4937e-72.6466e-84.4293e-959.390
RSP GUHHE1.8135e-62.7241e-71.4169e-73.8123e-82.0967e-85.2456e-68.0493e-72.9769e-86.3829e-959.390
LSD GUHHZ1.5010e-61.9429e-79.8062e-83.0576e-81.3304e-82.4665e-64.0063e-72.0841e-85.0175e-960.054
LSD GUHHN2.4732e-63.1485e-71.2845e-73.7347e-81.7707e-86.1364e-64.2030e-72.4416e-86.3075e-960.054
LSD GUHHE1.8061e-62.4003e-79.8691e-83.8987e-81.9291e-83.0466e-65.5559e-72.7996e-85.2885e-960.054
BHB GUHHZ7.4074e-71.4878e-71.1431e-74.5161e-81.6196e-83.1029e-65.6704e-72.3013e-84.5014e-968.9121
BHB GUHHN7.1618e-71.6162e-71.0495e-73.7712e-81.6063e-82.9813e-64.3653e-71.9479e-83.8758e-968.9121
BHB GUHHE7.6432e-71.1921e-79.2949e-84.1483e-81.6158e-81.9561e-63.9735e-72.4122e-83.4297e-968.9121
MRGE IVHHZ4.1509e-75.1489e-83.1598e-82.0832e-82.2488e-83.6651e-71.8138e-73.5589e-86.4326e-981.331
MRGE IVHHN9.5132e-78.2659e-83.6410e-81.8979e-81.5133e-89.9864e-71.8941e-72.0577e-81.8377e-981.331
MRGE IVHHE5.8362e-76.0917e-83.2883e-81.6877e-81.2603e-86.7272e-71.3920e-72.0727e-82.1264e-981.331
PZZ GUHHZ8.6140e-72.2522e-71.9521e-76.1100e-82.7071e-83.1999e-67.2779e-74.0974e-85.9092e-986.5147
PZZ GUHHN8.4127e-72.8584e-72.1512e-77.4238e-83.9559e-82.8884e-61.5685e-66.1152e-87.0361e-986.5147
PZZ GUHHE1.3423e-64.2120e-72.7744e-77.9362e-85.0961e-83.9543e-61.5479e-67.1926e-89.9129e-986.5147
*IH (Housner Intensity) calculated on the velocity spectrum (SV) between 0.1 and 0.5 s (IH0), 0.1 and 1.0 s (IH1), 0.1 and 1.5 s (IH2)

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