MANUAL Location - Area: Alpi Cozie , magnitude (ML): 0.6
2026-04-21 00:52:27 (UTC)

Regional Seismic Network of Northwestern Italy (Distav, University of Genoa)
Posted on: 2026-04-21 06:54:34

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Earthquake info - Manual location
Event - ID :260421005201
Magnitude (ML) :0.6 +/- 0.2
Origin Time :2026-04-21 00:52:27.824 (UTC)
Location : Latitude: 44.548 N, Longitude: 6.954 E
Area :Alpi Cozie
Depth (km) :6.20
Distances (km) : 6.2 --- Bellino
8.5 --- Acceglio
10.2 --- Pontechianale
10.3 --- Casteldelfino
10.7 --- Prazzo
10.8 --- Elva
14.4 --- Canosio
14.4 --- Stroppo
14.8 --- Marmora
16.9 --- Argentera
18.5 --- Macra
19.0 --- Sampeyre
19.3 --- Celle di Macra
23.3 --- Crissolo
23.5 --- Pietraporzio
23.6 --- Oncino
24.6 --- Ostana
24.7 --- San Damiano Macra
25.1 --- Sambuco
25.5 --- Frassino

Quality location estimate: Erh: 0.7 km, Erz: 0.9 km, Nf: 32, Gap: 107 °, 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.
PONCIV2026-04-21 00:52:30.9770.02000.430.732026-04-21 00:52:32.5200.04000.001.9113.0
SURFFR2026-04-21 00:52:31.1000.00900.001.982026-04-21 00:52:32.8200.0400-0.720.2614.8
PZZGU2026-04-21 00:52:31.2800.01000.031.852026-04-21 00:52:33.0300.1083-0.720.2815.6
VINDIV2026-04-21 00:52:34.0860.0200-0.041.872026-04-21 00:52:38.2420.0400-0.330.7432.4
BHBGU2026-04-21 00:52:35.7800.02310.340.602026-04-21 00:52:40.6900.1153-0.071.4240.7
ISOFR2026-04-21 00:52:36.1510.02000.510.772026-04-21 00:52:40.9170.1002-0.081.4341.8
RRLGU2026-04-21 00:52:36.2630.02000.011.772026-04-21 00:52:42.0880.0400-0.151.3344.2
STVGU2026-04-21 00:52:36.7760.02000.760.292026-04-21 00:52:41.6720.0400-0.061.5245.3
ENRGU2026-04-21 00:52:37.6010.02000.570.692026-04-21 00:52:43.4020.0400-0.061.4651.7
FENEIV2026-04-21 00:52:38.5420.02000.580.692026-04-21 00:52:44.7970.0400-0.251.0554.7
RSPGU2026-04-21 00:52:41.6300.02000.980.152026-04-21 00:52:49.7000.3047-0.011.0671.4
TURFFR2026-04-21 00:52:41.7050.02000.580.692026-04-21 00:52:50.0450.0400-0.490.6072.9
MVIFFR2026-04-21 00:52:42.8740.02001.330.102026-04-21 00:52:51.3600.2136-0.031.1374.4
ROROGU2026-04-21 00:52:45.4500.05020.171.102026-04-21 00:52:57.6630.04000.221.04101.0
LSDGU2026-04-21 00:52:47.0410.08031.250.142026-04-21 00:52:58.2910.0400-0.081.13102.6
IMIGU2026-04-21 00:52:45.5230.0803-0.191.182026-04-21 00:52:58.1450.0400-0.191.05103.3


Local magnitude (ML) calculation results
Station Net Channels Stat. Mag. Wood-And.
Ampl.
Dist. (km) Azimuth
PONC IVHH0.351.28e-113.032
PZZ GUHH0.361.62e-115.6110
BHB GUHH0.471.87e-240.737
RRL GUHH0.348.65e-344.2343
STV GUHH0.471.12e-245.3139
ENR GUHH0.914.75e-251.7134
FENE IVHH0.317.75e-354.79
RSP GUHH0.711.17e-271.420
TURF FRHH0.253.67e-372.9151
RORO GUHH0.725.10e-3101.0118
LSD GUHH0.907.42e-3102.68
IMI GUHH0.838.46e-3103.3133


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.
(°)
PONC IVHHZ3.5104e-53.1901e-67.3470e-73.2422e-71.9728e-72.1007e-53.9135e-63.6944e-75.9211e-813.032
PONC IVHHN1.8312e-51.9856e-65.4340e-71.9135e-71.2033e-72.1140e-52.5807e-62.1536e-74.2323e-813.032
PONC IVHHE2.4088e-52.5894e-68.1965e-72.5361e-71.3569e-72.6570e-54.6208e-62.5005e-75.0216e-813.032
PZZ GUHHZ2.1305e-52.6273e-69.2342e-72.2598e-71.2447e-72.7920e-54.5999e-62.2042e-75.6226e-815.6110
PZZ GUHHN2.4394e-52.6062e-61.1962e-63.7654e-71.7465e-73.5726e-55.7828e-62.9121e-74.9968e-815.6110
PZZ GUHHE3.0424e-53.3200e-61.6787e-64.2261e-72.5270e-76.0250e-58.3973e-63.6701e-77.7028e-815.6110
BHB GUHHZ3.4230e-64.9707e-71.9362e-74.9634e-83.7301e-88.9167e-66.8091e-78.0662e-81.0101e-840.737
BHB GUHHN2.2188e-62.8769e-71.6562e-74.2654e-82.4289e-84.4897e-65.4108e-74.2335e-87.3717e-940.737
BHB GUHHE3.7009e-64.0258e-71.5109e-75.4190e-83.0696e-85.5068e-66.4970e-75.7115e-89.0612e-940.737
ISO FRHHZ9.6175e-71.0513e-76.8768e-82.5552e-81.0521e-82.4758e-62.7143e-71.5839e-82.6968e-941.8169
ISO FRHHN9.8469e-71.0529e-75.4252e-81.7968e-88.3604e-92.1610e-61.9196e-71.3175e-82.5483e-941.8169
ISO FRHHE8.5140e-71.0798e-76.5303e-82.6331e-81.2604e-82.2802e-62.1216e-71.8927e-82.2788e-941.8169
RRL GUHHZ9.5295e-71.0536e-74.5100e-81.7634e-88.1089e-91.9544e-62.1488e-71.3074e-82.1507e-944.2343
RRL GUHHN1.1007e-61.4772e-78.2547e-82.3970e-81.1342e-82.2075e-62.1776e-71.7574e-83.3787e-944.2343
RRL GUHHE1.0112e-61.5325e-77.8647e-83.0425e-81.2950e-84.0137e-63.4485e-71.8700e-83.6696e-944.2343
STV GUHHZ1.4548e-62.1383e-79.9114e-82.4020e-81.2087e-82.2309e-63.3681e-71.9096e-84.5503e-945.3139
STV GUHHN1.6344e-62.1780e-71.0621e-72.5806e-81.2984e-85.6903e-64.2307e-72.0614e-84.9206e-945.3139
STV GUHHE1.5828e-62.0159e-79.9300e-82.1376e-81.1424e-84.3230e-64.1835e-71.8889e-83.8952e-945.3139
ENR GUHHZ6.8706e-65.5891e-71.6415e-73.7455e-82.1558e-88.4048e-65.7171e-74.3795e-81.1101e-851.7134
ENR GUHHN1.4552e-51.3252e-62.6628e-79.0904e-85.0873e-81.0508e-51.1616e-61.0852e-72.4083e-851.7134
ENR GUHHE1.5747e-51.3680e-62.7747e-76.2590e-83.5039e-81.2672e-51.3857e-68.4944e-82.4812e-851.7134
FENE IVHHZ1.5213e-61.8523e-75.7573e-82.0393e-81.0334e-82.3576e-62.0567e-71.6961e-83.5345e-954.79
FENE IVHHN1.5213e-61.9503e-77.1492e-81.9892e-81.0591e-83.0756e-62.2332e-71.8492e-84.6752e-954.79
FENE IVHHE1.3254e-61.6432e-76.1046e-81.6539e-88.3920e-92.8643e-62.6801e-71.4589e-83.1764e-954.79
RSP GUHHZ9.4193e-71.2493e-75.9624e-82.0958e-81.1970e-82.7225e-63.2166e-71.6676e-82.9487e-971.420
RSP GUHHN1.3832e-62.3096e-71.0262e-72.3943e-81.5060e-82.7525e-64.4384e-72.6555e-84.5643e-971.420
RSP GUHHE9.6668e-71.8287e-71.0340e-73.1488e-81.6185e-83.0379e-63.9860e-72.3288e-84.7168e-971.420
TURF FRHHZ2.1193e-72.7569e-82.0144e-89.3020e-94.5736e-97.2517e-78.1621e-86.8535e-97.9531e-1072.9151
TURF FRHHN2.7440e-75.5726e-83.4662e-81.0058e-85.5976e-91.1883e-61.5046e-77.6675e-91.3143e-972.9151
TURF FRHHE2.0288e-74.3869e-83.3575e-81.3988e-86.8017e-99.6041e-71.4717e-71.2261e-81.0642e-972.9151
RORO GUHHZ3.9226e-76.4458e-84.4121e-81.7522e-89.8853e-96.3925e-71.5421e-71.2860e-81.6369e-9101.0118
RORO GUHHN3.7617e-77.0635e-84.8770e-81.4078e-89.2612e-99.9529e-72.8878e-71.5483e-81.5637e-9101.0118
RORO GUHHE4.0879e-75.7116e-84.3279e-81.8509e-89.3426e-97.8763e-72.2587e-71.1163e-81.2701e-9101.0118
LSD GUHHZ3.6843e-76.3598e-83.5240e-81.0863e-84.8209e-96.7212e-71.3581e-78.2594e-91.3338e-9102.68
LSD GUHHN5.7962e-78.0845e-84.5342e-81.1303e-86.0554e-99.4391e-72.6270e-79.1542e-91.9094e-9102.68
LSD GUHHE6.0855e-79.1746e-86.2040e-82.0875e-81.1433e-89.7181e-74.5009e-71.7338e-82.3409e-9102.68
IMI GUHHZ3.2584e-74.2996e-83.0824e-82.2131e-81.7518e-87.0451e-71.4171e-72.4182e-81.6830e-9103.3133
IMI GUHHN8.2578e-71.0565e-76.7834e-83.6101e-82.0420e-81.6661e-63.3148e-72.8293e-83.6618e-9103.3133
IMI GUHHE4.3016e-77.9251e-84.4805e-81.8332e-81.7536e-81.0405e-61.8099e-72.7519e-81.6514e-9103.3133
*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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