MANUAL Location - Area: Francia , magnitude (ML): 0.9
2025-08-09 13:19:39 (UTC)

Regional Seismic Network of Northwestern Italy (Distav, University of Genoa)
Posted on: 2025-08-09 15:57:08

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Earthquake info - Manual location
Event - ID :250809131916
Magnitude (ML) :0.9 +/- 0.2
Origin Time :2025-08-09 13:19:39.895 (UTC)
Location : Latitude: 44.244 N, Longitude: 6.700 E
Area :Francia
Depth (km) :14.02
Distances (km) : 25.4 --- Argentera
28.7 --- Pietraporzio
31.6 --- Sambuco
34.6 --- Acceglio
38.4 --- Vinadio
38.5 --- Canosio
38.9 --- Prazzo
39.4 --- Marmora
42.0 --- Aisone
44.7 --- Castelmagno
44.8 --- Stroppo
45.2 --- Bellino
45.2 --- Elva
46.5 --- Celle di Macra
47.6 --- Macra
48.2 --- Demonte
48.4 --- Casteldelfino
49.5 --- Pontechianale
50.1 --- Pradleves
51.9 --- San Damiano Macra

Quality location estimate: Erh: 0.8 km, Erz: 0.6 km, Nf: 34, Gap: 111 °, Rms: 0.25


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.
SURFFR2025-08-09 13:19:45.8800.1206-0.171.292025-08-09 13:19:50.3310.3197-0.111.0431.1
ISOFR2025-08-09 13:19:46.1700.0150-0.171.302025-08-09 13:19:50.0800.0942-0.680.5132.3
VINDIV2025-08-09 13:19:47.6680.0200-0.251.102025-08-09 13:19:52.6040.0400-0.720.4741.0
OGDIFR2025-08-09 13:19:48.2900.02000.051.362025-08-09 13:19:54.1520.0400-0.251.1343.1
PZZGU2025-08-09 13:19:48.7900.0231-0.071.442025-08-09 13:19:54.5000.1394-0.670.5446.7
STVGU2025-08-09 13:19:49.4700.02610.111.202025-08-09 13:19:55.7340.16040.061.1452.0
MVIFFR2025-08-09 13:19:50.2710.02000.001.422025-08-09 13:19:57.1000.2577-0.650.5954.7
ENRGU2025-08-09 13:19:50.7300.03410.051.342025-08-09 13:19:58.2400.17750.280.7559.2
OGAGFR2025-08-09 13:19:51.5300.0361-0.111.392025-08-09 13:19:59.3060.1925-0.450.8463.6
TURFFR2025-08-09 13:19:51.8600.0562-0.021.402025-08-09 13:20:00.1900.1935-0.181.1064.3
ESCAFR2025-08-09 13:19:53.2300.03610.081.252025-08-09 13:20:02.4340.04000.071.1372.3
SAOFFR2025-08-09 13:19:53.6300.0200-0.311.002025-08-09 13:20:03.1310.0400-0.530.7275.3
BHBGU2025-08-09 13:19:54.4100.04020.081.222025-08-09 13:20:04.5520.04000.310.6780.8
GBOSGU2025-08-09 13:19:56.2300.04620.210.882025-08-09 13:20:06.6950.2817-0.280.9292.0
MGROGU2025-08-09 13:19:56.1100.0462-0.700.502025-08-09 13:20:07.9070.0400-0.540.7292.5
IMIGU2025-08-09 13:19:57.9500.1577-0.231.122025-08-09 13:20:10.8020.0400-0.041.07103.3
RSPGU2025-08-09 13:19:59.8100.05620.420.422025-08-09 13:20:12.6800.0400-0.171.04111.0


Local magnitude (ML) calculation results
Station Net Channels Stat. Mag. Wood-And.
Ampl.
Dist. (km) Azimuth
ISO FRHH0.473.22e-232.3103
PZZ GUHH0.947.73e-246.748
STV GUHH0.992.80e-252.090
OGAG FRHH0.761.60e-263.6348
TURF FRHH0.721.40e-264.3118
ESCA FRHH0.791.31e-272.3130
SAOF FRHH0.566.97e-375.3112
BHB GUHH0.841.03e-280.834
GBOS GUHH1.381.50e-292.090
MGRO GUHH0.919.70e-392.5104
IMI GUHH1.232.10e-2103.3111
RSP GUHH0.957.34e-3111.024


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.
(°)
ISO FRHHZ5.5164e-65.7926e-72.7071e-78.5575e-84.6214e-88.9213e-61.2534e-67.1691e-81.1903e-832.3103
ISO FRHHN5.8239e-67.2923e-72.7796e-76.6242e-83.3424e-89.3460e-69.4402e-76.1882e-81.4801e-832.3103
ISO FRHHE4.9554e-65.1383e-71.9257e-75.8209e-82.9834e-87.8809e-69.5888e-74.9758e-88.6765e-932.3103
PZZ GUHHZ6.1495e-61.1156e-67.2287e-71.7039e-71.0013e-71.8859e-52.8547e-61.6561e-72.7551e-846.748
PZZ GUHHN7.9551e-61.1361e-66.8611e-72.0867e-71.0742e-72.4939e-53.6556e-61.5625e-72.8862e-846.748
PZZ GUHHE7.1990e-61.3021e-67.6686e-72.5644e-71.2697e-71.9068e-53.6927e-61.9687e-73.2976e-846.748
STV GUHHZ3.6589e-65.0825e-72.5144e-77.8231e-83.5605e-81.2272e-51.3470e-65.2611e-81.0959e-852.090
STV GUHHN4.2000e-64.5110e-72.5163e-79.0370e-84.5212e-86.2681e-61.3294e-66.5053e-89.8675e-952.090
STV GUHHE3.3640e-65.3974e-72.6236e-77.8569e-83.2607e-81.1890e-51.1810e-65.1387e-81.2234e-852.090
ENR GUHHZ8.8065e-69.9264e-73.9542e-71.6125e-75.4743e-81.7351e-51.3837e-69.5603e-82.3115e-859.291
ENR GUHHN1.6673e-52.0023e-67.0790e-72.7074e-71.3834e-73.0554e-53.9369e-62.3308e-74.6477e-859.291
ENR GUHHE1.7385e-51.7636e-65.1867e-71.6111e-77.1973e-82.4835e-52.4731e-61.4156e-73.3838e-859.291
OGAG FRHHZ8.5511e-72.0851e-71.0519e-75.1409e-82.0223e-81.8353e-65.4415e-72.1623e-83.1448e-963.6348
OGAG FRHHN5.8601e-71.2474e-79.2794e-84.5342e-81.7676e-81.7188e-64.5250e-72.0569e-82.8149e-963.6348
OGAG FRHHE5.4006e-71.4038e-71.2464e-76.2575e-83.7176e-81.1357e-69.2034e-74.6529e-84.6282e-963.6348
TURF FRHHZ8.7921e-71.3804e-71.0184e-73.1404e-81.3898e-82.7251e-64.6074e-72.3218e-83.2222e-964.3118
TURF FRHHN1.4850e-62.8123e-71.1919e-72.8970e-81.7827e-84.7834e-65.1603e-72.9566e-86.2225e-964.3118
TURF FRHHE8.8089e-71.4253e-79.5379e-83.3052e-81.6877e-82.6204e-64.0002e-72.2154e-83.4942e-964.3118
ESCA FRHHZ1.0504e-61.5945e-79.3707e-83.4532e-81.4477e-81.7321e-65.2055e-72.0697e-83.2065e-972.3130
ESCA FRHHN1.4326e-62.0937e-71.1874e-74.2928e-81.9603e-84.9239e-64.6004e-73.1192e-84.8903e-972.3130
ESCA FRHHE1.2012e-62.2175e-71.2345e-74.2020e-83.0219e-82.9912e-64.9061e-75.4631e-85.7484e-972.3130
SAOF FRHHZ4.1514e-79.0377e-86.1144e-83.6558e-82.5115e-89.4907e-74.9258e-73.8821e-82.9079e-975.3112
SAOF FRHHN4.7212e-76.8009e-85.6345e-82.4589e-81.2458e-81.0133e-63.3241e-71.8494e-81.9745e-975.3112
SAOF FRHHE5.3760e-78.2827e-85.9976e-82.2028e-81.1817e-81.0082e-64.5760e-71.6299e-81.9252e-975.3112
BHB GUHHZ1.6621e-62.5211e-71.1439e-73.8904e-81.7974e-85.7111e-65.2761e-72.6024e-85.4083e-980.834
BHB GUHHN8.7998e-71.4532e-71.0048e-73.2284e-81.6680e-83.2176e-64.8047e-72.6710e-84.0735e-980.834
BHB GUHHE1.1000e-61.4981e-71.0049e-74.3949e-81.7862e-82.2561e-64.4336e-72.5396e-83.7306e-980.834
GBOS GUHHZ1.4571e-63.4487e-71.6300e-75.3168e-82.4598e-84.1450e-67.7095e-73.2009e-85.4352e-992.090
GBOS GUHHN1.2826e-61.9540e-71.4614e-75.5153e-82.7899e-84.8648e-67.5409e-74.3624e-85.1932e-992.090
GBOS GUHHE1.8143e-63.3484e-71.6093e-75.7569e-82.5577e-84.8302e-65.1464e-73.7069e-85.5883e-992.090
MGRO GUHHZ4.6629e-76.9884e-85.5415e-82.2946e-81.1194e-81.1670e-62.6083e-71.4446e-82.0093e-992.5104
MGRO GUHHN7.3389e-71.3331e-79.4023e-82.9995e-81.5169e-81.9857e-65.1500e-71.9404e-83.1822e-992.5104
MGRO GUHHE8.3516e-71.3611e-76.9342e-82.1334e-89.1436e-92.4238e-63.1286e-71.3243e-83.0535e-992.5104
IMI GUHHZ1.5992e-62.0602e-79.3763e-83.4690e-81.7090e-83.1568e-64.1025e-72.4766e-84.0514e-9103.3111
IMI GUHHN2.7438e-63.7999e-71.9164e-77.5521e-83.5310e-87.8535e-61.1979e-65.8649e-89.2238e-9103.3111
IMI GUHHE1.4490e-62.1042e-71.4407e-74.9480e-82.2695e-83.3217e-65.6410e-72.9036e-85.2150e-9103.3111
RSP GUHHZ4.4904e-76.7435e-85.1157e-82.2944e-88.8909e-99.9129e-72.2730e-71.1417e-81.6684e-9111.024
RSP GUHHN5.1126e-79.9068e-87.0721e-82.4561e-81.0680e-81.2466e-62.4493e-71.5433e-82.5423e-9111.024
RSP GUHHE5.6683e-71.0676e-77.7850e-82.6884e-81.1369e-82.1311e-63.4256e-71.6504e-82.7370e-9111.024
*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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