MANUAL Location - Area: Colline Metallifere , magnitude (ML): 1.8
2026-01-17 01:19:25 (UTC)

Regional Seismic Network of Northwestern Italy (Distav, University of Genoa)
Posted on: 2026-01-19 07:07:55

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Earthquake info - Manual location
Event - ID :260117011914
Magnitude (ML) :1.8 +/- 0.2
Origin Time :2026-01-17 01:19:25.803 (UTC)
Location : Latitude: 43.228 N, Longitude: 11.061 E
Area :Colline Metallifere
Depth (km) :15.57
Distances (km) : 4.1 --- Radicondoli
8.3 --- Chiusdino
11.3 --- Montieri
12.7 --- Castelnuovo di Val di Cecina
12.9 --- Casole d Elsa
13.7 --- Monticiano
14.8 --- Sovicille
17.1 --- Pomarance
18.8 --- Monterotondo Marittimo
22.5 --- Colle di Val d Elsa
22.7 --- Monteriggioni
24.0 --- Massa Marittima
24.1 --- Siena
25.4 --- Volterra
25.6 --- Roccastrada
26.8 --- San Gimignano
27.7 --- Murlo
28.0 --- Poggibonsi
28.5 --- Monteverdi Marittimo
29.3 --- Monteroni d Arbia

Quality location estimate: Erh: 2.9 km, Erz: 2.8 km, Nf: 26, Gap: 224 °, Rms: 0.28


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.
CSNTIV2026-01-17 01:19:33.0500.0251-0.031.482026-01-17 01:19:38.3800.11130.031.4936.5
OSSCIV2026-01-17 01:19:33.6560.02000.301.222026-01-17 01:19:39.4660.04000.680.5139.5
PIIIV2026-01-17 01:19:38.6600.0391-0.141.222026-01-17 01:19:48.2800.21860.051.2671.6
RUFIIV2026-01-17 01:19:40.4500.04720.081.522026-01-17 01:19:51.0500.23960.091.2278.5
MAIMGU2026-01-17 01:19:41.9200.04820.131.492026-01-17 01:19:53.0100.2757-0.390.7590.3
POPMGU2026-01-17 01:19:43.1400.05120.411.042026-01-17 01:19:55.8600.04000.730.6195.4
CARDGU2026-01-17 01:19:43.8600.05420.191.422026-01-17 01:19:56.4400.3948-0.230.87101.5
CMEIT2026-01-17 01:19:44.0560.02000.151.462026-01-17 01:19:57.1060.04000.031.25102.5
LMDIV2026-01-17 01:19:45.4500.0582-0.121.222026-01-17 01:20:00.6140.33570.101.04109.0
VLCMN2026-01-17 01:19:45.6350.0200-0.340.742026-01-17 01:20:02.0840.04001.040.34118.0
SARMGU2026-01-17 01:19:46.6100.06330.331.202026-01-17 01:20:03.2380.04001.700.06119.9
EQUIGU2026-01-17 01:19:48.2080.02000.980.302026-01-17 01:20:03.1420.0400-0.061.11128.2
MORSIFR2026-01-17 01:19:47.7700.0703-0.870.142026-01-17 01:20:06.3490.04000.391.02142.0


Local magnitude (ML) calculation results
Station Net Channels Stat. Mag. Wood-And.
Ampl.
Dist. (km) Azimuth
OSSC IVHH1.987.02e-139.524
PII IVHH1.649.39e-271.6322
MAIM GUHH1.786.80e-290.3329
POPM GUHH1.751.28e-195.4345
CARD GUHH1.989.24e-2101.5333
CME ITHN2.009.32e-2102.5323
VLC MNHH1.712.45e-2118.0333
SARM GUEH1.653.44e-2119.9334
EQUI GUHH1.662.48e-2128.2325
MORSIFRHH1.391.02e-2142.0258


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.
(°)
OSSC IVHHZ2.6388e-54.0240e-62.6754e-61.6236e-68.5966e-76.4216e-51.2406e-51.2031e-61.0776e-739.524
OSSC IVHHN4.1020e-58.0430e-65.2459e-61.9399e-61.0287e-61.7374e-42.6032e-51.5056e-62.2563e-739.524
OSSC IVHHE4.8547e-57.4792e-65.4781e-62.2628e-68.8652e-71.1665e-43.1550e-51.1331e-61.9758e-739.524
PII IVHHZ3.2860e-68.3427e-75.7556e-71.4878e-77.4506e-81.0566e-52.4325e-61.1155e-71.7635e-871.6322
PII IVHHN4.8291e-61.1202e-61.0097e-63.7945e-71.2226e-71.1430e-59.6642e-61.5957e-72.8294e-871.6322
PII IVHHE5.8364e-61.0509e-68.9026e-72.6051e-71.1015e-71.1357e-53.9863e-61.7524e-72.7681e-871.6322
MAIM GUHHZ2.9472e-65.4731e-73.6008e-71.3979e-76.2211e-81.1095e-51.8509e-68.5568e-81.2369e-890.3329
MAIM GUHHN4.7029e-69.6432e-76.3668e-72.6105e-79.6236e-82.2962e-52.8076e-61.4977e-71.9922e-890.3329
MAIM GUHHE3.9210e-67.6782e-74.7685e-71.7233e-78.6913e-81.4923e-51.7944e-61.2811e-72.0365e-890.3329
POPM GUHHZ3.5832e-67.7148e-75.0433e-71.6166e-78.0864e-81.3111e-52.8309e-61.2592e-72.0300e-895.4345
POPM GUHHN5.4522e-61.2148e-61.1105e-64.4613e-72.0038e-71.7543e-54.6691e-62.5334e-73.8200e-895.4345
POPM GUHHE4.8876e-61.3401e-61.2341e-63.2903e-71.5632e-71.1555e-58.8557e-62.2073e-73.6635e-895.4345
CARD GUHHZ3.6037e-66.5992e-73.9431e-71.4278e-75.6325e-89.7064e-62.1620e-68.6071e-81.5294e-8101.5333
CARD GUHHN7.1807e-61.3903e-68.3293e-72.6845e-71.3398e-73.4501e-54.7905e-61.9282e-73.3737e-8101.5333
CARD GUHHE4.9665e-61.1502e-67.4241e-72.1670e-79.7938e-82.4104e-54.6140e-61.4181e-72.5868e-8101.5333
CME ITHNZ2.7764e-66.6240e-76.6594e-73.5175e-71.8896e-79.1963e-64.0848e-62.5110e-72.0263e-8102.5323
CME ITHNN3.6523e-69.5551e-77.4669e-73.4186e-72.2418e-79.9581e-64.2820e-62.7693e-72.2904e-8102.5323
CME ITHNE4.1059e-69.4134e-78.8034e-74.8384e-72.6575e-71.2504e-55.3842e-63.6268e-72.6678e-8102.5323
VLC MNHHZ1.0087e-62.1334e-71.4875e-79.5371e-88.4897e-82.4440e-68.3749e-71.2633e-71.0530e-8118.0333
VLC MNHHN1.4624e-61.9257e-71.2778e-77.8628e-83.6828e-83.3359e-64.7064e-74.2387e-85.8359e-9118.0333
VLC MNHHE1.3103e-63.0205e-71.6425e-77.5118e-86.2122e-83.2164e-68.5145e-79.5236e-81.0042e-8118.0333
SARM GUEHZ5.8081e-71.4724e-71.1293e-76.6425e-82.9842e-81.7930e-65.6038e-73.7289e-83.1743e-9119.9334
SARM GUEHN7.6549e-71.9492e-71.8858e-71.9928e-78.1141e-82.0217e-66.4133e-78.6882e-88.0532e-9119.9334
SARM GUEHE5.7293e-71.5487e-71.2354e-71.0108e-73.6908e-81.2592e-66.3144e-74.3971e-84.8083e-9119.9334
EQUI GUHHZ9.4699e-72.5212e-71.6135e-75.5693e-82.7122e-83.3399e-61.0062e-63.6757e-86.1120e-9128.2325
EQUI GUHHN1.3172e-62.9726e-71.8606e-79.3196e-88.7555e-85.5595e-61.0908e-61.3774e-71.1311e-8128.2325
EQUI GUHHE7.5765e-71.7983e-71.1847e-75.4446e-83.0934e-82.8670e-64.0449e-73.6883e-84.8723e-9128.2325
MORSIFRHHZ6.0309e-71.1185e-79.3615e-85.4466e-82.8580e-81.4663e-65.9074e-73.5374e-83.7297e-9142.0258
MORSIFRHHN4.3479e-71.0909e-78.7323e-83.5731e-82.2880e-81.2940e-65.8312e-73.7971e-82.9806e-9142.0258
MORSIFRHHE6.0665e-71.3310e-71.0546e-74.9620e-82.8732e-81.6790e-66.0739e-73.5100e-83.4060e-9142.0258
*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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