MANUAL Location - Area: Alpi Marittime , magnitude (ML): 0.2
2025-07-28 10:07:06 (UTC)

Regional Seismic Network of Northwestern Italy (Distav, University of Genoa)
Posted on: 2025-07-28 12:24:28

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Earthquake info - Manual location
Event - ID :250728100642
Magnitude (ML) :0.2 +/- 0.2
Origin Time :2025-07-28 10:07:06.802 (UTC)
Location : Latitude: 44.025 N, Longitude: 7.486 E
Area :Alpi Marittime
Depth (km) :6.52
Distances (km) : 16.2 --- Olivetta San Michele
17.4 --- Rocchetta Nervina
17.4 --- Pigna
17.9 --- Airole
18.4 --- Castel Vittorio
20.3 --- Isolabona
20.9 --- Limone Piemonte
21.1 --- Apricale
22.0 --- Briga Alta
22.2 --- Dolceacqua
22.7 --- Perinaldo
22.7 --- Triora
23.1 --- Baiardo
23.4 --- Molini di Triora
24.7 --- Vernante
25.0 --- Entracque
25.6 --- Soldano
25.8 --- Camporosso
26.1 --- Mendatica
26.3 --- San Biagio della Cima

Quality location estimate: Erh: 0.7 km, Erz: 0.8 km, Nf: 24, Gap: 72 °, 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.
SAOFFR2025-07-28 10:07:10.1910.02000.900.012025-07-28 10:07:11.8240.04000.660.329.9
TURFFR2025-07-28 10:07:10.1900.00500.600.442025-07-28 10:07:11.7400.03000.041.7611.4
MLIGIV2025-07-28 10:07:10.9630.0200-0.071.372025-07-28 10:07:13.7860.0400-0.310.2617.6
ESCAFR2025-07-28 10:07:12.0590.02000.231.152025-07-28 10:07:14.8850.0400-0.520.1924.4
ENRGU2025-07-28 10:07:11.8320.02000.181.482025-07-28 10:07:14.9400.0942-0.051.3824.6
MGROGU2025-07-28 10:07:12.6680.02000.141.602025-07-28 10:07:16.5940.0400-0.011.5727.1
BIGNGU2025-07-28 10:07:12.2060.0200-0.031.632025-07-28 10:07:16.1800.04000.081.7227.6
STVGU2025-07-28 10:07:12.3700.01600.021.772025-07-28 10:07:15.7400.0702-0.400.2928.6
MVIFFR2025-07-28 10:07:13.0700.0130-0.041.552025-07-28 10:07:16.8000.0772-0.910.1130.9
IMIGU2025-07-28 10:07:13.8060.02000.231.212025-07-28 10:07:18.5370.04000.121.6035.8
GBOSGU2025-07-28 10:07:14.4490.02000.500.372025-07-28 10:07:19.1740.04000.440.5137.8
ISOFR2025-07-28 10:07:14.3700.02000.151.602025-07-28 10:07:18.4760.1303-0.900.1339.7


Local magnitude (ML) calculation results
Station Net Channels Stat. Mag. Wood-And.
Ampl.
Dist. (km) Azimuth
TURF FRHH-0.076.09e-211.4233
ESCA FRHH-0.111.44e-224.4202
ENR GUHH0.375.90e-224.6347
BIGN GUEH0.212.37e-227.6130
STV GUHH0.644.04e-228.6333
IMI GUHH0.121.58e-235.8111
ISO FRHH0.109.12e-339.7297


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.
(°)
SAOF FRHHZ3.2821e-66.7503e-73.0952e-71.1327e-75.1301e-86.1004e-61.4224e-67.0245e-81.4441e-89.9127
SAOF FRHHN5.4259e-65.1693e-71.4124e-76.0964e-83.3380e-85.1983e-66.3766e-75.0721e-81.1255e-89.9127
SAOF FRHHE4.2111e-66.2762e-72.4689e-79.8644e-85.7480e-89.2647e-69.6833e-78.2048e-81.2660e-89.9127
TURF FRHHZ4.4969e-65.2304e-71.8201e-77.7301e-89.3080e-87.2288e-61.0310e-61.4799e-73.4322e-811.4233
TURF FRHHN9.6190e-61.0551e-64.2785e-71.3743e-77.9126e-81.1344e-51.5378e-61.2854e-72.6665e-811.4233
TURF FRHHE4.4757e-64.8615e-72.0093e-77.0037e-83.9262e-81.0646e-59.5030e-76.7583e-81.3226e-811.4233
ESCA FRHHZ1.4876e-61.5543e-76.2707e-82.6542e-82.3571e-81.8862e-62.7975e-73.6999e-84.2717e-924.4202
ESCA FRHHN2.3619e-62.7240e-78.1224e-83.8879e-83.0428e-82.9121e-63.5734e-74.8980e-85.2793e-924.4202
ESCA FRHHE1.6457e-61.9674e-71.1616e-74.2205e-83.1009e-83.4569e-66.0817e-74.8590e-84.5778e-924.4202
ENR GUHHZ1.7711e-52.0620e-62.6103e-77.9406e-85.5259e-81.1960e-59.1313e-79.9321e-81.6952e-824.6347
ENR GUHHN2.4004e-52.3663e-63.5660e-71.1741e-75.0957e-81.7403e-51.6089e-69.9919e-82.6348e-824.6347
ENR GUHHE2.6879e-51.9012e-64.1709e-71.1500e-75.9542e-82.3287e-51.6088e-61.3421e-73.6435e-824.6347
MGRO GUHHZ7.8192e-71.2493e-74.3982e-83.4734e-82.4992e-89.7638e-72.0922e-73.3381e-83.8730e-927.186
MGRO GUHHN1.4486e-61.4141e-75.0689e-82.7010e-82.4679e-81.5932e-62.3677e-73.6043e-84.9746e-927.186
MGRO GUHHE1.0987e-61.1739e-74.7764e-83.0654e-82.7397e-81.6250e-61.9932e-73.4347e-82.8765e-927.186
BIGN GUEHZ2.0495e-62.3230e-77.8537e-84.5400e-84.6660e-82.6977e-62.7569e-77.6824e-86.5746e-927.6130
BIGN GUEHN5.2698e-65.3827e-71.8029e-78.1940e-85.1491e-81.0672e-57.3404e-77.2273e-81.6039e-827.6130
BIGN GUEHE7.1391e-67.0483e-71.4376e-76.6710e-84.3878e-87.6563e-65.2514e-77.1290e-81.3670e-827.6130
STV GUHHZ5.8020e-65.2840e-71.6481e-75.7438e-82.8056e-85.7107e-67.6488e-76.0504e-81.1835e-828.6333
STV GUHHN6.2765e-65.9265e-71.8262e-76.9026e-83.9737e-86.1375e-67.7121e-76.8694e-81.1855e-828.6333
STV GUHHE8.7206e-69.5737e-72.8759e-79.4852e-84.9228e-89.0820e-61.2880e-69.5898e-82.0641e-828.6333
IMI GUHHZ1.8518e-61.4923e-76.7553e-84.0205e-83.7115e-81.6401e-62.9770e-75.9746e-85.5235e-935.8111
IMI GUHHN2.7422e-63.4348e-71.0980e-75.5124e-84.8421e-83.2756e-65.5064e-77.5797e-87.6211e-935.8111
IMI GUHHE1.6627e-61.7819e-77.8048e-83.6534e-82.7775e-82.3216e-63.7056e-73.9979e-86.3996e-935.8111
GBOS GUHHZ1.8973e-62.9325e-71.4009e-74.7811e-86.3461e-85.0356e-65.2621e-71.0369e-72.0609e-837.849
GBOS GUHHN1.3218e-61.9607e-78.8968e-83.7590e-82.6753e-82.6401e-62.5755e-73.5883e-84.4150e-937.849
GBOS GUHHE1.8164e-63.3118e-71.5613e-73.9391e-82.6028e-84.6500e-66.3368e-74.7731e-88.0380e-937.849
ISO FRHHZ1.1473e-69.9600e-84.1946e-81.3228e-81.0672e-81.4570e-61.1978e-71.3659e-81.9684e-939.7297
ISO FRHHN1.2432e-61.8828e-77.4758e-82.3926e-81.4798e-83.4593e-63.0235e-72.1274e-84.1566e-939.7297
ISO FRHHE5.9285e-78.2936e-84.3086e-81.4425e-81.2151e-81.6022e-61.2545e-72.1735e-82.6996e-939.7297
*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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