MANUAL Location - Area: Alpi Graie , magnitude (ML): 0.9
2025-11-04 11:32:37 (UTC)

Regional Seismic Network of Northwestern Italy (Distav, University of Genoa)
Posted on: 2025-11-05 07:34:11

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Earthquake info - Manual location
Event - ID :251104113112
Magnitude (ML) :0.9 +/- 0.2
Origin Time :2025-11-04 11:32:37.485 (UTC)
Location : Latitude: 45.477 N, Longitude: 6.660 E
Area :Alpi Graie
Depth (km) :6.01
Distances (km) : 35.0 --- La Thuile
35.8 --- Valgrisenche
37.2 --- Rhemes-Notre-Dame
39.3 --- Moncenisio
40.8 --- Pre -Saint-Didier
42.3 --- Novalesa
42.8 --- Courmayeur
42.8 --- Morgex
43.4 --- Rhemes-Saint-Georges
43.9 --- La Salle
44.3 --- Bardonecchia
44.7 --- Venaus
44.7 --- Valsavarenche
45.0 --- Ceresole Reale
45.5 --- Avise
46.6 --- Giaglione
46.8 --- Arvier
46.9 --- Mompantero
47.1 --- Exilles
47.1 --- Chiomonte

Quality location estimate: Erh: 0.8 km, Erz: 1.8 km, Nf: 26, Gap: 166 °, Rms: 0.24


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.
RSLFR2025-11-04 11:32:42.4400.0160-0.001.532025-11-04 11:32:45.3000.0722-0.420.9624.4
OGMOFR2025-11-04 11:32:43.4300.01900.181.042025-11-04 11:32:46.8590.0932-0.341.0630.5
LSDGU2025-11-04 11:32:44.9300.02210.230.822025-11-04 11:32:49.4900.1113-0.051.3837.9
MRGEIV2025-11-04 11:32:46.2770.02000.031.512025-11-04 11:32:51.7740.1002-0.321.0945.7
RSPGU2025-11-04 11:32:48.5200.03310.031.472025-11-04 11:32:55.7440.2236-0.281.0960.2
RRLGU2025-11-04 11:32:49.0100.0341-0.041.442025-11-04 11:32:56.8200.2637-0.261.0763.1
LATOIV2025-11-04 11:32:49.5000.0200-0.091.382025-11-04 11:32:57.7930.04000.031.2865.9
CIROGU2025-11-04 11:32:50.6040.0200-0.510.782025-11-04 11:32:58.8500.3357-1.290.1572.5
OGAGFR2025-11-04 11:32:50.0470.0200-1.370.062025-11-04 11:33:00.9600.0400-0.371.0177.5
BHBGU2025-11-04 11:32:52.8490.02000.181.062025-11-04 11:33:02.7200.2757-0.400.9085.8
SENINCH2025-11-04 11:32:59.8150.02002.420.002025-11-04 11:33:11.4450.04000.270.75110.5
PZZGU2025-11-04 11:32:56.9290.0200-0.390.992025-11-04 11:33:10.7330.0400-0.580.70113.8


Local magnitude (ML) calculation results
Station Net Channels Stat. Mag. Wood-And.
Ampl.
Dist. (km) Azimuth
LSD GUHH0.542.77e-237.993
RSP GUHH1.114.27e-260.2127
RRL GUHH0.901.50e-263.1171
CIRO GUHH0.981.07e-272.579
OGAG FRHH0.831.23e-277.5187
BHB GUHH0.931.12e-285.8146
SENINCHHH1.301.55e-2110.526
PZZ GUHH1.001.23e-2113.8161


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.
(°)
LSD GUHHZ6.7924e-64.9668e-71.6777e-77.1922e-83.2727e-84.9480e-66.7600e-75.5887e-89.3060e-937.993
LSD GUHHN7.9141e-67.1517e-72.5175e-78.2071e-83.9479e-81.0157e-58.2884e-77.0506e-81.3508e-837.993
LSD GUHHE5.8666e-65.1359e-71.9632e-76.9002e-83.5875e-87.4786e-61.0338e-66.0859e-81.0247e-837.993
MRGE IVHHZ1.8223e-61.9698e-76.1851e-82.6835e-81.2305e-81.7571e-63.1370e-71.8174e-83.9302e-945.744
MRGE IVHHN4.4054e-64.1274e-78.6192e-83.9935e-82.1958e-84.0282e-64.0277e-73.5782e-86.6602e-945.744
MRGE IVHHE4.5773e-63.7264e-77.8308e-83.2313e-81.6235e-83.2015e-63.4442e-73.0423e-86.8815e-945.744
RSP GUHHZ2.2039e-63.5989e-72.0077e-75.6475e-82.7790e-84.6265e-66.6731e-73.9814e-88.3551e-960.2127
RSP GUHHN3.0920e-65.7918e-73.7633e-71.0167e-74.7667e-86.7012e-61.4669e-67.8294e-81.4985e-860.2127
RSP GUHHE3.7566e-66.8692e-73.6727e-79.0947e-84.9306e-81.1302e-51.9960e-67.6897e-81.5538e-860.2127
RRL GUHHZ6.4326e-78.3115e-87.2253e-83.5899e-81.6305e-81.4625e-63.8592e-72.4331e-82.1485e-963.1171
RRL GUHHN6.4572e-71.6567e-71.3192e-75.9381e-82.2576e-82.5271e-65.8752e-72.8981e-84.4385e-963.1171
RRL GUHHE5.6678e-71.4881e-71.2917e-74.4328e-81.6705e-81.1990e-68.4856e-72.1477e-84.2049e-963.1171
CIRO GUHHZ7.3670e-79.7362e-83.3447e-81.4537e-86.6227e-91.0222e-61.4006e-78.5394e-91.8703e-972.579
CIRO GUHHN5.6290e-78.5664e-83.8828e-81.9614e-87.7680e-91.0574e-62.3629e-71.1619e-81.8078e-972.579
CIRO GUHHE2.2935e-63.4022e-77.9977e-83.2414e-81.7273e-82.4718e-63.4388e-73.4511e-86.6745e-972.579
OGAG FRHHZ1.7691e-74.8747e-85.6943e-85.2850e-82.5138e-87.9592e-72.8959e-72.8912e-82.5513e-977.5187
OGAG FRHHN2.5167e-78.0783e-86.2356e-83.7809e-82.1649e-86.6802e-72.9122e-73.1258e-82.8081e-977.5187
OGAG FRHHE2.9324e-71.1097e-77.1317e-88.1004e-84.5963e-85.1316e-74.3160e-74.5124e-83.6392e-977.5187
BHB GUHHZ7.3462e-71.3371e-79.2605e-83.3128e-82.3380e-83.4082e-63.4780e-74.4066e-83.5418e-985.8146
BHB GUHHN8.3463e-71.7643e-71.1344e-73.9247e-81.9239e-83.0054e-66.9346e-73.3188e-83.8953e-985.8146
BHB GUHHE7.0738e-71.3575e-78.1083e-83.3084e-81.2979e-82.8589e-62.8273e-71.8475e-83.1668e-985.8146
SENINCHHHZ4.5368e-71.1188e-78.5957e-84.8304e-82.1938e-81.2975e-65.3285e-72.5130e-83.1816e-9110.526
SENINCHHHN2.9495e-71.3304e-79.3662e-86.4333e-86.1984e-89.0451e-75.3994e-71.0672e-73.1832e-8110.526
SENINCHHHE3.2029e-71.1302e-78.7115e-87.4702e-84.6257e-89.0230e-73.6270e-76.1805e-81.5040e-8110.526
PZZ GUHHZ5.3340e-71.1508e-79.5116e-83.3557e-81.6409e-81.1385e-64.0495e-72.3258e-82.9945e-9113.8161
PZZ GUHHN4.4805e-71.0947e-71.0754e-75.1524e-84.5995e-81.5035e-65.8499e-78.5682e-85.5974e-9113.8161
PZZ GUHHE5.9326e-71.3249e-71.0834e-73.2260e-81.6360e-81.8820e-64.5478e-72.7408e-83.1396e-9113.8161
*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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