MANUAL Location - Area: Alpi Graie , magnitude (ML): 1.8
2025-07-01 15:04:05 (UTC)

Regional Seismic Network of Northwestern Italy (Distav, University of Genoa)
Posted on: 2025-07-02 07:22:50

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Earthquake info - Manual location
Event - ID :250701150331
Magnitude (ML) :1.8 +/- 0.2
Origin Time :2025-07-01 15:04:05.353 (UTC)
Location : Latitude: 45.636 N, Longitude: 6.956 E
Area :Alpi Graie
Depth (km) :6.99
Distances (km) : 8.4 --- Valgrisenche
9.2 --- La Thuile
14.5 --- Rhemes-Notre-Dame
14.5 --- Pre -Saint-Didier
15.0 --- Morgex
15.3 --- La Salle
15.6 --- Rhemes-Saint-Georges
16.6 --- Avise
17.6 --- Courmayeur
18.1 --- Arvier
18.7 --- Saint-Nicolas
19.0 --- Introd
20.3 --- Valsavarenche
21.0 --- Villeneuve
22.8 --- Saint-Pierre
23.6 --- Aymavilles
25.2 --- Sarre
26.3 --- Jovencan
27.1 --- Saint-Rhemy-En-Bosses
27.4 --- Gressan

Quality location estimate: Erh: 0.9 km, Erz: 1.7 km, Nf: 34, Gap: 78 °, 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.
MRGEIV2025-07-01 15:04:09.5200.0190-0.031.602025-07-01 15:04:12.0900.0511-0.251.0519.1
COURMFR2025-07-01 15:04:10.0700.01900.121.342025-07-01 15:04:13.1240.06310.111.3322.2
BLANCGU2025-07-01 15:04:10.7400.02000.170.952025-07-01 15:04:14.0000.0722-0.091.4325.5
LSDGU2025-07-01 15:04:10.4600.02510.101.432025-07-01 15:04:13.4200.0722-0.291.0125.7
RSLFR2025-07-01 15:04:10.7600.0221-0.021.642025-07-01 15:04:13.7090.0872-0.670.3827.2
REMYGU2025-07-01 15:04:11.3600.02110.001.662025-07-01 15:04:15.0640.1354-0.360.9228.9
CIROGU2025-07-01 15:04:14.3200.0321-0.540.552025-07-01 15:04:19.7700.1394-1.360.1248.7
OGMOFR2025-07-01 15:04:14.8500.0351-0.041.542025-07-01 15:04:20.9200.1615-0.420.8552.5
LATOIV2025-07-01 15:04:15.4780.04010.200.882025-07-01 15:04:21.7560.1002-0.081.3354.7
RSPGU2025-07-01 15:04:16.1300.03910.011.532025-07-01 15:04:23.1400.1785-0.271.0659.9
DIXCH2025-07-01 15:04:16.6550.0331-0.121.362025-07-01 15:04:24.2730.1303-0.500.7161.1
RRLGU2025-07-01 15:04:19.5600.0492-0.291.042025-07-01 15:04:28.8240.8259-0.960.4081.0
SENINCH2025-07-01 15:04:20.7870.0602-0.141.312025-07-01 15:04:31.0780.3638-0.760.5085.6
BHBGU2025-07-01 15:04:21.6800.05420.340.462025-07-01 15:04:32.2970.4198-0.070.8292.5
OGAGFR2025-07-01 15:04:22.0400.0623-1.050.162025-07-01 15:04:35.4500.3047-0.050.90100.0


Local magnitude (ML) calculation results
Station Net Channels Stat. Mag. Wood-And.
Ampl.
Dist. (km) Azimuth
MRGE IVHH1.922.06e+019.129
BLANCGUHH1.769.68e-125.5356
LSD GUHH1.333.58e-125.7145
REMY GUHH1.352.96e-128.935
CIRO GUHH1.811.68e-148.794
RSP GUHH1.842.36e-159.9156
DIX CHHH2.144.16e-161.135
RRL GUHH1.786.66e-281.0189
SENINCHHH2.031.54e-185.618
BHB GUHH1.878.23e-292.5165
OGAG FRHH1.614.08e-2100.0199


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.
(°)
MRGE IVHHZ3.0070e-43.4182e-58.5966e-62.6831e-61.8112e-63.1699e-43.5317e-53.3758e-66.5026e-719.129
MRGE IVHHN8.1502e-47.0239e-51.1960e-53.9055e-62.3883e-61.0002e-33.6462e-55.4172e-61.4009e-619.129
MRGE IVHHE5.5910e-44.5925e-56.3516e-62.5914e-61.6135e-63.8346e-42.1790e-53.1785e-67.7773e-719.129
COURMFRHHZ2.7632e-43.9457e-51.6343e-55.4567e-62.5336e-64.6853e-48.4196e-54.1873e-69.2369e-722.22
COURMFRHHN2.2977e-44.7543e-53.0590e-57.9498e-64.2420e-67.2395e-42.0176e-46.7310e-61.1931e-622.22
COURMFRHHE3.2796e-45.6288e-53.0172e-51.1157e-54.8329e-68.4259e-41.6697e-48.0475e-61.5053e-622.22
BLANCGUHHZ3.7868e-56.9807e-65.1147e-62.2203e-61.0537e-69.0598e-53.3843e-51.2515e-61.9069e-725.5356
BLANCGUHHN4.5137e-58.0261e-65.4525e-61.9971e-69.8029e-79.7827e-53.6493e-51.4078e-62.1661e-725.5356
BLANCGUHHE4.2171e-51.0829e-56.7627e-63.1373e-61.7739e-61.1572e-43.9091e-52.5145e-63.5870e-725.5356
LSD GUHHZ4.4298e-54.4132e-61.6680e-68.7933e-75.4634e-75.5903e-56.8914e-68.0630e-71.0855e-725.7145
LSD GUHHN6.7555e-57.7190e-62.7167e-61.0053e-65.4742e-78.8765e-51.8192e-59.1360e-71.7304e-725.7145
LSD GUHHE8.7413e-59.3596e-62.7681e-61.1139e-65.9080e-71.0923e-41.3935e-59.5963e-71.7564e-725.7145
REMY GUHHZ3.9546e-54.9591e-62.5065e-69.4989e-73.6993e-77.4058e-51.2518e-54.4772e-79.3779e-828.935
REMY GUHHN4.0506e-55.7901e-62.9467e-61.3541e-65.4066e-78.9854e-51.1571e-57.8513e-71.4178e-728.935
REMY GUHHE3.4175e-55.0591e-62.6130e-61.0598e-64.0699e-75.5127e-51.1443e-55.6799e-79.1698e-828.935
CIRO GUHHZ1.2217e-51.6177e-67.8628e-72.5404e-71.2740e-71.8325e-55.5127e-61.8598e-73.5789e-848.794
CIRO GUHHN1.9480e-52.3475e-61.3000e-63.3226e-72.2264e-73.2227e-54.8500e-63.8784e-76.9152e-848.794
CIRO GUHHE1.3518e-51.3311e-66.4493e-72.3762e-71.1839e-72.2276e-53.2404e-61.5907e-72.9479e-848.794
RSP GUHHZ1.8889e-52.1652e-61.0945e-63.3408e-71.7996e-71.6777e-54.8484e-63.0482e-74.4567e-859.9156
RSP GUHHN1.4679e-53.6154e-61.9692e-65.0084e-73.1043e-73.0352e-59.3408e-65.0475e-79.3069e-859.9156
RSP GUHHE1.3471e-52.9280e-61.9064e-65.7928e-73.1980e-73.8676e-57.8182e-64.7754e-77.1872e-859.9156
DIX CHHHZ3.2883e-55.0033e-63.2428e-61.1586e-66.0880e-78.7278e-52.1017e-59.3980e-71.5245e-761.135
DIX CHHHN4.5139e-56.5474e-63.9602e-61.2624e-65.3839e-71.2245e-41.4032e-57.7398e-71.4522e-761.135
DIX CHHHE4.1419e-55.3193e-63.8051e-61.1198e-66.5634e-71.3334e-42.3818e-59.9731e-71.6389e-761.135
RRL GUHHZ1.5660e-64.2153e-73.0012e-71.8492e-77.1473e-84.6318e-61.7872e-68.9815e-81.2403e-881.0189
RRL GUHHN1.8719e-65.5755e-75.4693e-72.4259e-71.1649e-79.5510e-64.4652e-61.3784e-71.7003e-881.0189
RRL GUHHE2.0086e-66.1871e-76.2976e-73.9014e-71.7299e-75.0449e-65.0866e-62.5630e-71.9024e-881.0189
SENINCHHHZ1.3140e-53.5462e-62.3192e-66.8399e-73.8746e-73.2153e-51.3229e-55.7168e-79.0563e-885.618
SENINCHHHN6.4492e-61.5828e-61.1916e-65.1115e-72.3677e-72.2824e-56.9435e-63.4946e-74.4881e-885.618
SENINCHHHE9.5321e-61.5793e-61.3789e-66.3594e-72.5613e-73.3127e-56.0216e-63.2183e-74.7450e-885.618
BHB GUHHZ7.8171e-61.0620e-65.5019e-72.1826e-78.4337e-82.6278e-51.7764e-61.0833e-72.0477e-892.5165
BHB GUHHN5.3665e-61.0295e-66.6677e-72.4643e-71.1266e-71.5662e-52.9793e-61.7926e-72.7900e-892.5165
BHB GUHHE2.9407e-64.3804e-73.7855e-71.6774e-77.3339e-89.1485e-61.3057e-69.5958e-81.1686e-892.5165
OGAG FRHHZ1.0565e-62.4283e-72.5162e-71.6930e-71.1963e-74.4254e-61.6426e-61.6996e-78.2550e-9100.0199
OGAG FRHHN7.9146e-72.7764e-72.7550e-71.3425e-76.7598e-82.3972e-61.7823e-69.9949e-88.7792e-9100.0199
OGAG FRHHE7.7605e-73.2617e-73.0886e-72.3491e-79.5769e-81.5063e-62.5256e-61.2343e-79.1927e-9100.0199
*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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