MANUAL Location - Area: Alpi Marittime , magnitude (ML): -0.2
2025-09-08 05:23:51 (UTC)

Regional Seismic Network of Northwestern Italy (Distav, University of Genoa)
Posted on: 2025-09-08 10:38:56

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Earthquake info - Manual location
Event - ID :250908052217
Magnitude (ML) :-0.2 +/- 0.2
Origin Time :2025-09-08 05:23:51.481 (UTC)
Location : Latitude: 44.072 N, Longitude: 7.656 E
Area :Alpi Marittime
Depth (km) :4.60
Distances (km) : 7.5 --- Briga Alta
11.9 --- Mendatica
12.4 --- Triora
12.8 --- Montegrosso Pian Latte
13.0 --- Molini di Triora
14.0 --- Cosio di Arroscia
15.3 --- Pigna
15.7 --- Limone Piemonte
15.9 --- Castel Vittorio
17.0 --- Pornassio
18.2 --- Rezzo
19.4 --- Baiardo
20.5 --- Rocchetta Nervina
20.6 --- Armo
20.8 --- Carpasio
20.9 --- Pieve di Teco
21.2 --- Apricale
21.4 --- Isolabona
21.5 --- Vernante
21.9 --- Montalto Ligure

Quality location estimate: Erh: 1.6 km, Erz: 2.6 km, Nf: 13, Gap: 87 °, Rms: 0.07


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.
SAOFFR2025-09-08 05:23:54.4800.0120-0.011.77--:---.-----.---.-- 13.3
MGROGU2025-09-08 05:23:54.8900.01200.001.762025-09-08 05:23:57.3650.0400-0.061.4814.1
TURFFR2025-09-08 05:23:56.4510.0200-0.270.322025-09-08 05:23:59.4230.0400-1.110.0024.2
GBOSGU2025-09-08 05:23:56.9170.02000.490.002025-09-08 05:24:00.9640.04001.140.0024.5
ENRGU2025-09-08 05:23:56.5100.1195-0.081.232025-09-08 05:24:00.2080.04000.061.2326.4
IMIGU2025-09-08 05:23:56.8680.02000.041.482025-09-08 05:24:00.6730.0400-0.141.0426.7
STVGU2025-09-08 05:23:57.7540.02000.001.662025-09-08 05:24:01.9360.1002-0.141.0233.1


Local magnitude (ML) calculation results
Station Net Channels Stat. Mag. Wood-And.
Ampl.
Dist. (km) Azimuth
MGRO GUHH-0.382.06e-214.1105
TURF FRHH-0.495.98e-324.2243
GBOS GUHH-0.048.44e-324.538
ENR GUHH-0.042.00e-226.4313
IMI GUHH-0.041.93e-226.7133
STV GUHH-0.085.76e-333.1306


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.
(°)
MGRO GUHHZ8.4094e-72.1452e-72.0693e-71.1545e-74.5554e-81.8318e-61.0491e-66.0288e-86.6614e-914.1105
MGRO GUHHN1.0280e-61.7004e-71.6623e-71.2563e-76.5999e-84.4258e-68.9087e-79.7310e-85.8005e-914.1105
MGRO GUHHE1.3314e-61.8269e-71.8000e-79.1817e-84.3532e-82.1896e-68.5199e-75.3292e-85.1149e-914.1105
TURF FRHHZ4.7136e-74.7010e-83.8526e-82.7490e-81.3151e-85.3052e-71.8485e-72.0074e-81.5452e-924.2243
TURF FRHHN4.7855e-78.0943e-85.0225e-82.4175e-81.3983e-81.4133e-62.5620e-72.0177e-82.3927e-924.2243
TURF FRHHE4.1770e-77.1001e-84.1103e-82.4652e-81.4825e-81.1939e-62.6684e-72.0208e-81.9126e-924.2243
GBOS GUHHZ3.9553e-77.8703e-85.4162e-83.4268e-81.4052e-81.0555e-62.5052e-71.6572e-81.9404e-924.538
GBOS GUHHN7.6879e-71.0286e-77.1342e-85.2705e-82.2895e-81.0404e-62.9906e-73.0631e-83.3616e-924.538
GBOS GUHHE3.3504e-75.5225e-84.4357e-84.3358e-81.6538e-86.8976e-71.6199e-72.1315e-81.8610e-924.538
ENR GUHHZ9.8154e-71.8075e-71.0736e-74.9368e-81.9989e-82.5242e-64.9007e-72.5377e-83.8033e-926.4313
ENR GUHHN2.5565e-62.9793e-71.7899e-79.8083e-87.2352e-84.1859e-66.2717e-71.2190e-71.1066e-826.4313
ENR GUHHE2.7125e-62.8639e-71.3302e-76.0686e-82.5915e-83.9961e-64.3806e-73.9817e-86.3522e-926.4313
IMI GUHHZ6.5870e-78.5870e-85.8570e-84.0653e-81.8222e-89.0350e-72.6120e-72.0544e-82.4924e-926.7133
IMI GUHHN1.4293e-62.2479e-71.7112e-71.1795e-75.2452e-82.9601e-68.1643e-76.7394e-86.2857e-926.7133
IMI GUHHE6.9120e-79.9889e-88.0790e-84.7624e-81.9070e-81.8083e-63.5795e-72.6710e-82.8099e-926.7133
STV GUHHZ6.0939e-78.7262e-85.8794e-82.2341e-88.2764e-91.5510e-62.4021e-71.1940e-81.9386e-933.1306
STV GUHHN5.4078e-77.9704e-84.8359e-81.9516e-89.2090e-91.3985e-61.6293e-71.3869e-81.8998e-933.1306
STV GUHHE7.1205e-79.7042e-85.3745e-82.3552e-81.0426e-81.8235e-62.0804e-71.3478e-81.8659e-933.1306
*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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