MANUAL Location - Area: Lunigiana , magnitude (ML): 0.9
2025-02-15 23:12:51 (UTC)

Regional Seismic Network of Northwestern Italy (Distav, University of Genoa)
Posted on: 2025-02-17 08:52:53

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Earthquake info - Manual location
Event - ID :250215231227
Magnitude (ML) :0.9 +/- 0.2
Origin Time :2025-02-15 23:12:51.593 (UTC)
Location : Latitude: 44.180 N, Longitude: 9.898 E
Area :Lunigiana
Depth (km) :13.23
Distances (km) : 1.1 --- Bolano
2.4 --- Santo Stefano di Magra
3.4 --- Follo
4.3 --- Vezzano Ligure
4.8 --- Podenzana
6.8 --- Aulla
7.0 --- Arcola
8.0 --- Tresana
8.7 --- Calice al Cornoviglio
9.0 --- Sarzana
10.3 --- La Spezia
10.5 --- Beverino
10.8 --- Fosdinovo
11.0 --- Ricco del Golfo di Spezia
11.5 --- Lerici
12.9 --- Castelnuovo Magra
13.3 --- Villafranca in Lunigiana
13.4 --- Ameglia
13.8 --- Rocchetta di Vara
14.0 --- Pignone

Quality location estimate: Erh: 0.9 km, Erz: 1 km, Nf: 30, Gap: 95 °, Rms: 0.35


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.
AULIT2025-02-15 23:12:54.5010.02000.021.752025-02-15 23:12:55.2870.0400-1.270.1614.9
PLMAIV2025-02-15 23:12:55.4000.0190-0.021.792025-02-15 23:12:57.7800.0621-0.421.1619.9
FIVIGU2025-02-15 23:12:56.0960.02000.011.792025-02-15 23:12:58.9220.0400-0.371.2723.7
EQUIGU2025-02-15 23:12:56.1300.0261-0.210.892025-02-15 23:12:59.0380.0752-0.730.5224.5
CARIT2025-02-15 23:12:56.2010.0200-0.381.312025-02-15 23:12:59.1340.0400-1.120.3427.2
MSSAIV2025-02-15 23:12:57.7500.0261-0.640.552025-02-15 23:13:01.7140.0400-1.820.0836.8
GRAMGU2025-02-15 23:12:58.6700.0291-0.071.492025-02-15 23:13:04.0300.12730.290.4039.7
VLCMN2025-02-15 23:12:58.8750.0200-0.021.672025-02-15 23:13:03.8790.0400-0.351.2241.3
SARMGU2025-02-15 23:12:59.0950.0200-0.321.272025-02-15 23:13:04.2110.2206-0.940.5142.5
CMEIT2025-02-15 23:12:59.5130.02000.041.522025-02-15 23:13:04.4080.0400-0.850.4643.0
BVTIT2025-02-15 23:12:58.7300.0200-1.020.352025-02-15 23:13:04.0310.0400-1.660.1043.3
ERBMIV2025-02-15 23:13:00.8100.0200-0.371.252025-02-15 23:13:07.8200.1554-0.530.9550.9
BDIIV2025-02-15 23:13:01.8850.0200-0.031.512025-02-15 23:13:08.9750.0400-0.471.0359.0
PIIIV2025-02-15 23:13:04.4150.02000.061.232025-02-15 23:13:13.5550.0400-0.211.2772.7
RNCAGU2025-02-15 23:13:05.7050.02000.061.222025-02-15 23:13:14.9300.3718-0.410.9583.1


Local magnitude (ML) calculation results
Station Net Channels Stat. Mag. Wood-And.
Ampl.
Dist. (km) Azimuth
PLMA IVHH1.163.78e-119.9194
FIVI GUHN1.062.21e-123.770
EQUI GUHH0.698.85e-224.594
CAR ITHN1.222.51e-127.2289
MSSA IVHH0.815.47e-236.8297
GRAM GUHH0.635.66e-239.721
VLC MNHH0.732.56e-241.393
SARM GUEH0.542.63e-242.589
CME ITHN1.128.23e-243.0128
BVT ITHN1.138.18e-243.3342
ERBM IVEH0.762.52e-250.957
BDI IVHH0.812.66e-259.0103
PII IVHH1.022.18e-272.7135
RNCA GUHH1.061.75e-283.1294


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.
(°)
PLMA IVHHZ2.8985e-52.6320e-67.7636e-72.3521e-71.4994e-72.8195e-53.3738e-62.3251e-74.5457e-819.9194
PLMA IVHHN3.1793e-56.0634e-62.8936e-68.6828e-75.3391e-79.1489e-51.1224e-58.5394e-71.5688e-719.9194
PLMA IVHHE5.5669e-55.7870e-61.5505e-65.7477e-73.2336e-77.5230e-56.0342e-66.1651e-71.4126e-719.9194
FIVI GUHNZ2.6655e-53.1633e-61.7056e-63.5848e-72.1371e-75.4797e-55.9169e-63.6571e-77.7335e-823.770
FIVI GUHNN2.2403e-53.4140e-62.0817e-65.4312e-72.9552e-74.1777e-51.0052e-55.2257e-79.0441e-823.770
FIVI GUHNE1.3528e-52.1936e-61.1571e-63.5800e-71.8216e-74.9748e-53.3031e-62.3777e-75.0473e-823.770
EQUI GUHHZ1.7954e-51.8624e-64.2752e-71.3051e-77.2355e-81.7609e-52.1175e-61.1987e-73.8574e-824.594
EQUI GUHHN1.9302e-52.2193e-65.7541e-72.2738e-71.2585e-73.5163e-52.1698e-62.1472e-74.6486e-824.594
EQUI GUHHE1.6072e-51.5279e-65.8656e-73.4833e-71.7188e-71.7611e-52.4716e-62.2506e-73.5598e-824.594
CAR ITHNZ3.5577e-52.8369e-61.0025e-64.0960e-72.2541e-74.0945e-54.4328e-63.5169e-75.7493e-827.2289
CAR ITHNN3.1693e-55.3520e-61.9476e-67.2281e-73.2939e-76.9059e-58.0429e-65.5818e-71.1090e-727.2289
CAR ITHNE2.3085e-54.0013e-61.7249e-64.7204e-72.2988e-77.2392e-58.5971e-63.6459e-78.0794e-827.2289
MSSA IVHHZ2.2576e-63.6108e-71.9156e-77.0354e-83.3546e-87.1646e-65.7126e-75.1000e-89.3130e-936.8297
MSSA IVHHN5.0087e-68.6248e-74.3071e-71.3076e-78.0256e-81.3756e-51.4780e-61.1809e-72.1265e-836.8297
MSSA IVHHE2.4557e-64.6663e-72.4179e-79.6078e-84.7109e-86.8801e-61.0713e-66.0402e-81.0051e-836.8297
GRAM GUHHZ9.6606e-61.1226e-62.8365e-78.1826e-83.3862e-88.2724e-61.2005e-65.7846e-81.0064e-839.721
GRAM GUHHN3.9903e-68.5142e-75.1961e-71.8557e-76.7774e-81.3743e-52.4903e-61.0712e-71.8033e-839.721
GRAM GUHHE3.6508e-67.1249e-75.6832e-71.5626e-77.9441e-89.1045e-62.8255e-61.1280e-71.8613e-839.721
VLC MNHHZ4.6329e-64.5875e-71.5552e-74.0667e-82.5547e-85.3622e-66.2163e-75.5147e-88.0991e-941.393
VLC MNHHN3.4842e-64.3517e-71.7307e-75.4855e-83.2246e-88.0192e-64.7404e-75.7001e-89.2865e-941.393
VLC MNHHE6.2865e-66.7276e-72.2033e-75.8082e-83.1811e-89.7961e-69.3233e-75.9805e-81.2500e-841.393
SARM GUEHZ2.1537e-63.0295e-71.1418e-73.0723e-81.9790e-83.6161e-65.5689e-72.5977e-85.3498e-942.589
SARM GUEHN4.0533e-64.7884e-72.3034e-71.1097e-74.4616e-84.9390e-61.0851e-67.3197e-89.0795e-942.589
SARM GUEHE4.4224e-64.1969e-71.7998e-76.8854e-82.6794e-84.4909e-66.3374e-73.9015e-88.8530e-942.589
CME ITHNZ5.6086e-66.8512e-74.1171e-72.5463e-71.4900e-71.4227e-51.8417e-62.1538e-71.7208e-843.0128
CME ITHNN6.7447e-68.4095e-75.7509e-74.7634e-74.5398e-71.1035e-52.6674e-67.8435e-74.3054e-843.0128
CME ITHNE9.4026e-61.0933e-65.9389e-72.2783e-71.3061e-71.3772e-52.1448e-61.9314e-72.8829e-843.0128
BVT ITHNZ4.1230e-64.1168e-73.4560e-72.6409e-71.1087e-74.9691e-61.8151e-61.4575e-71.3345e-843.3342
BVT ITHNN3.5201e-65.9897e-74.4646e-74.2512e-75.2252e-79.6767e-62.1529e-69.7387e-73.9985e-843.3342
BVT ITHNE4.1407e-65.9158e-74.1661e-72.6361e-71.5660e-78.7387e-61.9227e-61.6212e-71.3212e-843.3342
ERBM IVEHZ1.5317e-62.3239e-71.4191e-77.1665e-83.0509e-83.1500e-64.6891e-73.4778e-84.8800e-950.957
ERBM IVEHN1.8046e-63.6582e-71.9232e-71.0085e-76.9569e-85.6596e-67.4108e-71.2856e-71.5368e-850.957
ERBM IVEHE1.9757e-63.2707e-71.8570e-78.7722e-83.9535e-86.3945e-66.6046e-74.5989e-87.7399e-950.957
BDI IVHHZ2.3352e-62.9277e-71.2457e-73.4789e-81.8834e-84.8818e-64.9367e-72.8407e-86.3826e-959.0103
BDI IVHHN3.2041e-64.8100e-72.5628e-77.7714e-83.7683e-87.5662e-61.3403e-64.9185e-89.5062e-959.0103
BDI IVHHE2.9503e-64.7863e-72.2319e-76.5849e-83.2410e-88.0301e-61.1076e-64.5619e-89.7806e-959.0103
PII IVHHZ7.6742e-71.7667e-71.3213e-77.3890e-82.7462e-81.5309e-64.6303e-73.7827e-84.1991e-972.7135
PII IVHHN1.4194e-62.1853e-71.8010e-71.1346e-74.1460e-83.2529e-66.9451e-75.5053e-86.0147e-972.7135
PII IVHHE1.2063e-62.2046e-71.7557e-77.8533e-83.3129e-83.6481e-68.4721e-74.7313e-86.6417e-972.7135
RNCA GUHHZ7.4053e-71.3000e-79.0717e-83.4351e-82.2402e-82.3611e-64.4879e-73.1970e-84.3222e-983.1294
RNCA GUHHN1.1851e-62.4027e-71.5365e-75.5450e-82.5574e-83.3109e-66.2112e-73.5090e-86.5006e-983.1294
RNCA GUHHE1.0249e-62.6255e-71.8141e-75.5491e-82.6082e-84.6798e-68.5365e-74.3037e-86.3183e-983.1294
*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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