MANUAL Location - Area: Alpi Apuane , magnitude (ML): 0.4
2025-11-15 04:11:12 (UTC)

Regional Seismic Network of Northwestern Italy (Distav, University of Genoa)
Posted on: 2025-11-15 14:50:14

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Earthquake info - Manual location
Event - ID :251115041046
Magnitude (ML) :0.4 +/- 0.2
Origin Time :2025-11-15 04:11:12.038 (UTC)
Location : Latitude: 43.915 N, Longitude: 10.394 E
Area :Alpi Apuane
Depth (km) :2.28
Distances (km) : 6.0 --- Pescaglia
6.3 --- Massarosa
7.7 --- Camaiore
9.7 --- Fabbriche di Vallico
11.9 --- Lucca
12.2 --- Stazzema
12.6 --- Viareggio
13.7 --- Pietrasanta
14.2 --- Borgo a Mozzano
14.7 --- Vecchiano
15.3 --- Vergemoli
16.1 --- Seravezza
16.4 --- Capannori
16.7 --- Gallicano
17.2 --- San Giuliano Terme
17.8 --- Molazzana
18.5 --- Forte dei Marmi
19.0 --- Bagni di Lucca
19.2 --- Barga
19.6 --- Coreglia Antelminelli

Quality location estimate: Erh: 1.1 km, Erz: 0.9 km, Nf: 24, Gap: 147 °, 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.
MAIMGU2025-11-15 04:11:14.2500.00600.002.152025-11-15 04:11:15.5700.0340-0.320.358.2
CMEIT2025-11-15 04:11:13.9990.0200-0.091.522025-11-15 04:11:15.6380.04000.041.909.0
CARDGU2025-11-15 04:11:15.3400.01000.340.332025-11-15 04:11:17.6470.07120.460.2214.5
PIIIV2025-11-15 04:11:16.1000.0110-1.080.102025-11-15 04:11:19.0900.0651-1.960.0024.0
VLCMN2025-11-15 04:11:17.2240.0200-0.022.092025-11-15 04:11:21.2670.34070.200.8127.3
SARMGU2025-11-15 04:11:17.8530.02000.022.022025-11-15 04:11:22.1600.10830.071.3830.1
POPMGU2025-11-15 04:11:18.3290.02000.022.002025-11-15 04:11:22.8980.0400-0.111.4132.6
EQUIGU2025-11-15 04:11:18.6830.02000.041.852025-11-15 04:11:22.8400.1675-0.630.3134.0
FIVIGU2025-11-15 04:11:20.0580.0200-0.071.722025-11-15 04:11:25.1700.0400-0.880.2242.0
GSCLGU2025-11-15 04:11:24.2590.02002.200.002025-11-15 04:11:28.6450.1002-0.690.2850.9
ERBMIV2025-11-15 04:11:22.6840.0200-0.181.042025-11-15 04:11:30.4970.0400-0.520.3756.2
GRAMGU2025-11-15 04:11:24.7100.02000.170.952025-11-15 04:11:33.4800.22360.041.0069.3


Local magnitude (ML) calculation results
Station Net Channels Stat. Mag. Wood-And.
Ampl.
Dist. (km) Azimuth
CME ITHN0.442.99e-19.0301
PII IVHH0.132.54e-224.0154
VLC MNHH0.352.35e-227.3359
SARM GUEH0.182.22e-230.11
POPM GUHH0.183.26e-232.663
EQUI GUHH0.422.60e-234.0325
GSCL GUHH0.853.15e-250.918
ERBM IVEH0.266.61e-356.22
GRAM GUHH0.631.79e-269.3338


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.
(°)
MAIM GUHHZ1.0249e-51.2659e-64.3473e-71.3010e-78.3964e-82.6406e-51.8698e-61.5261e-73.1016e-88.291
MAIM GUHHN1.6787e-51.7673e-67.3303e-72.0590e-71.0768e-72.2222e-53.3037e-61.6738e-73.3554e-88.291
MAIM GUHHE1.1502e-51.1109e-65.3568e-72.5371e-71.0635e-71.9357e-52.0357e-61.5215e-72.7833e-88.291
CME ITHNZ2.3797e-52.4395e-61.2304e-63.9240e-72.1059e-73.4421e-57.0483e-63.1418e-74.9054e-89.0301
CME ITHNN3.5630e-54.6570e-62.6596e-66.8408e-74.0127e-78.1220e-57.7770e-66.8633e-71.2646e-79.0301
CME ITHNE3.9840e-54.8327e-62.6709e-68.1048e-75.0986e-76.7000e-51.2126e-57.9339e-71.2890e-79.0301
CARD GUHHZ2.5503e-53.1151e-61.0655e-64.0366e-72.0203e-73.4969e-54.6116e-63.3703e-76.2189e-814.530
CARD GUHHN1.2130e-41.1711e-52.8865e-66.5850e-74.0195e-71.0281e-41.3082e-59.1005e-72.2963e-714.530
CARD GUHHE6.5306e-57.2219e-61.6427e-64.7683e-72.2657e-77.2330e-54.3831e-65.0323e-71.2751e-714.530
PII IVHHZ4.4745e-65.6258e-72.2443e-78.1156e-83.2075e-84.4051e-61.4717e-64.8206e-88.8009e-924.0154
PII IVHHN2.6306e-63.6302e-72.1718e-78.0389e-83.3229e-84.8697e-61.0482e-65.1818e-89.4992e-924.0154
PII IVHHE4.0658e-64.8134e-72.8791e-71.2335e-75.1210e-89.1381e-61.4442e-66.5223e-81.2684e-824.0154
VLC MNHHZ2.9341e-63.5852e-71.5062e-73.7655e-82.2680e-84.9260e-66.2089e-74.0273e-87.4079e-927.3359
VLC MNHHN4.7813e-65.0174e-71.8663e-75.4268e-82.8529e-88.4893e-67.7843e-74.6768e-89.1162e-927.3359
VLC MNHHE3.3999e-64.9008e-71.9163e-75.2829e-83.1643e-89.9959e-68.9495e-75.7908e-81.1243e-827.3359
SARM GUEHZ1.2142e-61.6400e-78.6769e-83.6423e-81.8185e-82.1069e-63.5676e-72.8779e-84.2203e-930.11
SARM GUEHN1.5480e-62.4061e-71.4154e-71.0866e-75.6549e-82.7432e-67.1448e-78.0555e-89.0800e-930.11
SARM GUEHE1.7824e-61.9004e-71.1695e-75.1371e-82.2861e-83.8913e-66.4012e-72.9226e-84.4823e-930.11
POPM GUHHZ3.6653e-64.3357e-71.7291e-76.5484e-83.2264e-88.7275e-61.0271e-65.2317e-81.0183e-832.663
POPM GUHHN3.5373e-65.7907e-72.7635e-76.1622e-83.4860e-87.9372e-61.3182e-66.0594e-81.2535e-832.663
POPM GUHHE3.1692e-64.7782e-72.9005e-79.8626e-84.2448e-87.6013e-61.7311e-66.5765e-81.1870e-832.663
EQUI GUHHZ4.8707e-64.9716e-72.5619e-76.9373e-83.9917e-86.6782e-61.0636e-66.8827e-81.1624e-834.0325
EQUI GUHHN4.8780e-65.8886e-71.7686e-76.3054e-88.4328e-88.0169e-66.8760e-71.6553e-72.8324e-834.0325
EQUI GUHHE5.8616e-65.6131e-71.9875e-76.0157e-83.2252e-81.3960e-57.9123e-76.4278e-81.3590e-834.0325
FIVI GUHNZ4.2870e-68.9678e-74.8876e-71.9577e-71.3385e-71.1673e-52.1264e-61.9424e-72.2752e-842.0330
FIVI GUHNN4.6344e-61.0454e-65.9074e-74.3751e-74.2761e-71.3910e-52.4027e-66.3820e-73.4252e-842.0330
FIVI GUHNE3.6834e-66.3760e-74.5585e-72.3894e-71.3208e-71.0290e-51.4858e-62.3294e-71.5430e-842.0330
GSCL GUHHZ7.8578e-79.5689e-86.4622e-83.2020e-82.1999e-82.0846e-63.2826e-72.4326e-82.2024e-950.918
GSCL GUHHN1.4507e-62.5864e-72.0575e-79.0018e-89.7320e-83.1338e-61.0855e-61.7679e-71.7135e-850.918
GSCL GUHHE1.1781e-62.8621e-72.1109e-71.2534e-79.0998e-83.6832e-69.3031e-71.9640e-71.5192e-850.918
ERBM IVEHZ5.9877e-77.2395e-83.9831e-82.0291e-81.7895e-81.6005e-61.6776e-72.7614e-82.5033e-956.22
ERBM IVEHN6.8973e-71.1050e-76.4310e-82.0907e-81.4065e-82.6511e-63.2735e-72.2894e-83.5829e-956.22
ERBM IVEHE1.1083e-61.4436e-75.5896e-81.6744e-81.6438e-82.3682e-62.5514e-73.2240e-84.5625e-956.22
GRAM GUHHZ1.3030e-61.7219e-79.1840e-82.8171e-82.3728e-81.9842e-63.5546e-73.5231e-84.2824e-969.3338
GRAM GUHHN1.1915e-62.3873e-71.7277e-74.7138e-83.3417e-83.0910e-67.3756e-75.7140e-86.0954e-969.3338
GRAM GUHHE1.0588e-62.2067e-72.0185e-75.6038e-82.7476e-83.0010e-61.2761e-63.8411e-86.7507e-969.3338
*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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