MANUAL Location - Area: Francia , magnitude (ML): 0.8
2025-05-07 22:31:48 (UTC)

Regional Seismic Network of Northwestern Italy (Distav, University of Genoa)
Posted on: 2025-05-08 06:44:41

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Earthquake info - Manual location
Event - ID :250507223053
Magnitude (ML) :0.8 +/- 0.2
Origin Time :2025-05-07 22:31:48.47 (UTC)
Location : Latitude: 45.312 N, Longitude: 6.585 E
Area :Francia
Depth (km) :12.99
Distances (km) : 27.5 --- Bardonecchia
33.4 --- Moncenisio
35.5 --- Salbertrand
36.0 --- Exilles
36.3 --- Novalesa
36.5 --- Oulx
37.3 --- Venaus
38.0 --- Chiomonte
38.2 --- Sauze d Oulx
38.7 --- Giaglione
39.8 --- Mompantero
40.0 --- Gravere
41.4 --- Susa
43.1 --- Cesana Torinese
43.3 --- Pragelato
43.3 --- Claviere
43.4 --- Meana di Susa
45.4 --- Usseaux
45.5 --- Sestriere
46.6 --- Sauze di Cesana

Quality location estimate: Erh: 0.8 km, Erz: 1.9 km, Nf: 20, Gap: 181 °, Rms: 0.21


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.
OGMOFR2025-05-07 22:31:52.2600.01000.011.982025-05-07 22:31:54.1700.1303-0.690.4319.0
RSLFR2025-05-07 22:31:56.7300.0200-0.001.842025-05-07 22:32:01.7280.0400-0.580.4243.9
LSDGU2025-05-07 22:31:57.5500.0291-0.011.772025-05-07 22:32:02.9910.2246-0.750.4448.4
RRLGU2025-05-07 22:31:57.6600.0251-0.001.782025-05-07 22:32:03.2400.1263-0.850.3948.7
OGAGFR2025-05-07 22:31:59.4640.0200-0.021.672025-05-07 22:32:06.1080.0400-1.250.1560.1
MRGEIV2025-05-07 22:32:00.3760.0200-0.081.502025-05-07 22:32:08.4900.0400-0.061.2464.7
REMYGU2025-05-07 22:32:03.3710.02001.080.012025-05-07 22:32:12.2070.04000.510.2275.1
BHBGU2025-05-07 22:32:02.3100.04420.111.242025-05-07 22:32:11.6060.0400-0.071.1476.3
SURFFR2025-05-07 22:32:05.4780.02000.011.372025-05-07 22:32:17.3740.0400-0.360.7695.0
PZZGU2025-05-07 22:32:06.0450.02000.011.352025-05-07 22:32:17.5710.0400-1.030.3199.8


Local magnitude (ML) calculation results
Station Net Channels Stat. Mag. Wood-And.
Ampl.
Dist. (km) Azimuth
LSD GUHH0.903.87e-248.469
RRL GUHH0.963.00e-248.7160
OGAG FRHH0.771.83e-260.1184
MRGE IVHH0.639.74e-364.736
REMY GUHH0.556.82e-375.137
BHB GUHH0.821.13e-276.3135
PZZ GUHH1.041.87e-299.8155


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 GUHHZ4.7945e-65.9680e-72.0886e-75.2421e-82.5101e-88.4727e-68.5910e-75.0276e-81.2518e-848.469
LSD GUHHN8.3006e-68.4337e-73.5310e-77.4958e-84.1800e-81.5371e-51.5499e-67.7233e-81.7756e-848.469
LSD GUHHE4.4207e-63.9414e-71.9694e-74.7881e-82.5479e-84.3731e-68.3169e-74.2563e-88.2984e-948.469
RRL GUHHZ9.3695e-71.9418e-71.6576e-78.2204e-82.6069e-83.6361e-69.5095e-73.3029e-84.7249e-948.7160
RRL GUHHN1.5759e-63.8816e-72.8551e-71.0357e-74.3895e-86.1387e-61.4537e-65.7762e-89.0590e-948.7160
RRL GUHHE1.5436e-63.8651e-72.4649e-77.6365e-84.1727e-84.6523e-61.3021e-66.9597e-81.0631e-848.7160
OGAG FRHHZ6.4230e-71.5304e-71.3760e-76.2319e-82.5739e-82.4727e-67.0733e-73.0846e-84.0816e-960.1184
OGAG FRHHN8.1459e-72.3032e-71.6811e-75.7069e-83.1143e-82.0794e-66.7079e-73.9671e-85.6026e-960.1184
OGAG FRHHE5.9789e-71.6844e-71.6363e-71.0459e-74.3630e-81.4291e-68.6043e-76.5218e-85.4451e-960.1184
MRGE IVHHZ1.1801e-61.1467e-74.3813e-82.0103e-89.2828e-98.3948e-72.3599e-71.1864e-82.2713e-964.736
MRGE IVHHN1.5778e-61.6967e-78.2073e-83.7429e-83.7324e-82.8820e-63.3328e-76.7816e-87.1588e-964.736
MRGE IVHHE1.7567e-61.5467e-75.3752e-82.9074e-81.5338e-81.5896e-63.1449e-72.2193e-82.9774e-964.736
REMY GUHHZ3.9021e-73.6447e-83.0251e-81.6363e-88.0101e-95.9933e-72.0180e-71.0248e-81.0274e-975.137
REMY GUHHN3.7648e-77.5236e-85.3523e-83.2775e-81.5946e-88.8942e-72.7411e-72.3392e-81.7928e-975.137
REMY GUHHE3.0791e-75.1827e-84.5656e-82.4464e-81.4331e-88.6025e-72.6408e-72.4128e-81.5520e-975.137
BHB GUHHZ9.0807e-71.3169e-77.5154e-83.5740e-82.5807e-82.6757e-63.3228e-74.7892e-83.2145e-976.3135
BHB GUHHN9.4660e-71.5352e-71.0735e-74.4381e-82.3868e-83.7166e-64.7993e-74.1230e-84.4320e-976.3135
BHB GUHHE9.6226e-71.1734e-77.9717e-83.4066e-82.3491e-82.8979e-63.6958e-75.0278e-83.2860e-976.3135
PZZ GUHHZ6.0716e-71.3801e-71.4182e-75.0829e-82.3380e-81.7445e-66.8624e-72.9956e-84.1142e-999.8155
PZZ GUHHN5.4143e-71.4236e-71.2628e-74.8852e-82.6966e-81.6388e-68.6164e-74.7160e-84.6508e-999.8155
PZZ GUHHE9.5715e-72.2453e-72.1820e-75.8376e-83.0080e-82.6839e-61.1298e-64.3869e-85.5454e-999.8155
*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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