MANUAL Location - Area: Alpi Marittime , magnitude (ML): 0.3
2025-09-13 10:56:52 (UTC)

Regional Seismic Network of Northwestern Italy (Distav, University of Genoa)
Posted on: 2025-09-15 07:59:54

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Earthquake info - Manual location
Event - ID :250913105559
Magnitude (ML) :0.3 +/- 0.2
Origin Time :2025-09-13 10:56:52.768 (UTC)
Location : Latitude: 44.367 N, Longitude: 6.790 E
Area :Alpi Marittime
Depth (km) :5.80
Distances (km) : 12.2 --- Argentera
19.5 --- Pietraporzio
20.0 --- Acceglio
22.8 --- Sambuco
24.7 --- Prazzo
25.3 --- Canosio
26.2 --- Marmora
29.9 --- Bellino
30.6 --- Elva
30.9 --- Stroppo
31.2 --- Vinadio
33.3 --- Casteldelfino
33.5 --- Celle di Macra
33.9 --- Castelmagno
34.1 --- Pontechianale
34.3 --- Macra
34.6 --- Aisone
39.4 --- San Damiano Macra
39.4 --- Pradleves
39.5 --- Sampeyre

Quality location estimate: Erh: 1.3 km, Erz: 2.5 km, Nf: 18, Gap: 226 °, Rms: 0.16


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.
SURFFR2025-09-13 10:56:55.9020.0602-0.051.502025-09-13 10:56:58.3300.04000.031.6214.0
ISOFR2025-09-13 10:56:58.7080.0200-0.011.662025-09-13 10:57:02.1970.0400-0.510.3329.8
PZZGU2025-09-13 10:56:59.1900.50090.040.672025-09-13 10:57:03.2360.0400-0.500.3431.0
VINDIV2025-09-13 10:56:59.5270.02000.280.512025-09-13 10:57:03.6350.04000.011.4631.8
STVGU2025-09-13 10:57:01.2400.02000.041.542025-09-13 10:57:06.7680.0400-0.081.2045.2
ENRGU2025-09-13 10:57:02.4550.0200-0.081.292025-09-13 10:57:09.2110.04000.081.2352.7
RRLGU2025-09-13 10:57:03.5020.0200-0.780.172025-09-13 10:57:11.7440.0400-0.670.3062.1
BHBGU2025-09-13 10:57:04.7170.02000.260.692025-09-13 10:57:12.6100.0400-0.041.1364.4
TURFFR2025-09-13 10:57:04.9770.02000.121.242025-09-13 10:57:13.3660.0400-0.031.1265.1


Local magnitude (ML) calculation results
Station Net Channels Stat. Mag. Wood-And.
Ampl.
Dist. (km) Azimuth
ISO FRHH0.081.52e-229.8134
PZZ GUHH0.303.94e-231.059
STV GUHH0.256.78e-345.2107
ENR GUHH0.461.62e-252.7107
RRL GUHH0.344.35e-362.10
BHB GUHH0.203.93e-364.436
TURF FRHH0.641.16e-265.1132


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 FRHHZ2.2988e-62.7821e-71.0314e-72.6055e-81.2256e-85.3389e-63.1220e-72.3718e-85.4938e-929.8134
ISO FRHHN2.0870e-63.3937e-71.1685e-73.0297e-82.1927e-86.4477e-65.0088e-73.8521e-86.5245e-929.8134
ISO FRHHE3.4492e-63.3525e-78.1528e-82.5227e-81.6872e-83.5647e-62.8604e-73.2903e-86.8759e-929.8134
PZZ GUHHZ3.6662e-64.3952e-72.5348e-75.3738e-82.7405e-87.3582e-68.9521e-74.4824e-89.9448e-931.059
PZZ GUHHN3.3978e-64.7547e-72.3547e-76.8655e-83.2595e-81.0366e-56.5599e-75.0951e-81.0059e-831.059
PZZ GUHHE4.1598e-67.5889e-73.4995e-71.0936e-74.7192e-81.3967e-51.0546e-67.4390e-81.6680e-831.059
STV GUHHZ3.4286e-62.9111e-75.4622e-81.4831e-88.3815e-92.4081e-62.2018e-71.2851e-82.7805e-945.2107
STV GUHHN1.4844e-61.6748e-75.8036e-81.8873e-81.1975e-82.4718e-62.2871e-72.2378e-83.3509e-945.2107
STV GUHHE1.2397e-61.1662e-75.4258e-81.6317e-81.0464e-82.5187e-62.4173e-71.6723e-83.0033e-945.2107
ENR GUHHZ2.8895e-62.3608e-76.7929e-82.7416e-82.1660e-83.4411e-62.7504e-74.1990e-85.2124e-952.7107
ENR GUHHN5.0208e-64.8748e-71.2352e-74.5060e-82.3957e-85.8721e-64.6760e-74.0664e-88.7103e-952.7107
ENR GUHHE5.9665e-64.4413e-71.1589e-73.3996e-82.3574e-85.6222e-64.8386e-75.5841e-88.8436e-952.7107
RRL GUHHZ2.9167e-74.1559e-82.4564e-81.4527e-87.7812e-96.3819e-71.5711e-71.1158e-81.0602e-962.10
RRL GUHHN3.1330e-75.2097e-83.9756e-81.5369e-87.7702e-91.2308e-62.3151e-71.3565e-81.4457e-962.10
RRL GUHHE4.0883e-74.9916e-83.4296e-82.0419e-81.0912e-81.0033e-61.4327e-71.9047e-81.4736e-962.10
BHB GUHHZ8.5682e-71.4438e-75.6166e-81.8313e-81.9166e-82.6143e-62.4012e-74.5028e-82.5238e-964.436
BHB GUHHN4.6266e-77.1922e-84.0046e-81.6639e-81.3112e-81.1260e-62.2225e-72.8328e-81.8003e-964.436
BHB GUHHE6.1620e-76.8860e-83.7598e-81.2848e-81.2876e-81.5701e-61.8302e-73.1174e-81.8123e-964.436
TURF FRHHZ4.9605e-71.1178e-76.1338e-82.4328e-81.3560e-81.0330e-63.9282e-71.6845e-82.5941e-965.1132
TURF FRHHN4.8701e-71.4370e-71.1225e-72.8529e-81.6792e-81.4343e-67.2675e-72.9213e-83.4474e-965.1132
TURF FRHHE4.5727e-71.0586e-78.6391e-84.7903e-84.6439e-89.1955e-74.3322e-78.5602e-81.3636e-865.1132
*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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