MANUAL Location - Area: Frignano , magnitude (ML): 0.7
2025-12-09 17:21:42 (UTC)

Regional Seismic Network of Northwestern Italy (Distav, University of Genoa)
Posted on: 2025-12-10 07:46:21

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Earthquake info - Manual location
Event - ID :251209172010
Magnitude (ML) :0.7 +/- 0.2
Origin Time :2025-12-09 17:21:42.587 (UTC)
Location : Latitude: 44.295 N, Longitude: 10.509 E
Area :Frignano
Depth (km) :3.71
Distances (km) : 5.2 --- Frassinoro
8.5 --- Villa Minozzo
10.1 --- Toano
11.3 --- Montefiorino
11.5 --- Palagano
13.2 --- Pievepelago
13.4 --- Ligonchio
13.5 --- Riolunato
16.8 --- Busana
16.9 --- Fiumalbo
17.4 --- Villa Collemandina
17.5 --- Montecreto
17.8 --- Lama Mocogno
17.9 --- Castelnovo ne Monti
17.9 --- Castiglione di Garfagnana
18.0 --- Polinago
18.1 --- Carpineti
18.2 --- Sillano
18.9 --- San Romano in Garfagnana
19.4 --- Collagna

Quality location estimate: Erh: 0.7 km, Erz: 1 km, Nf: 26, Gap: 75 °, Rms: 0.24


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.
GSCLGU2025-12-09 17:21:45.4900.00600.191.162025-12-09 17:21:47.2300.0250-0.031.709.8
SARMGU2025-12-09 17:21:46.0700.01000.381.142025-12-09 17:21:47.9450.0481-0.051.5515.8
ERBMIV2025-12-09 17:21:46.5900.00900.011.802025-12-09 17:21:48.3950.1925-1.270.0916.4
VLCMN2025-12-09 17:21:46.6100.01100.470.802025-12-09 17:21:48.9710.05710.201.3218.5
CARDGU2025-12-09 17:21:48.5500.01700.361.182025-12-09 17:21:52.3700.09320.051.5630.3
FIVIGU2025-12-09 17:21:48.6470.02000.241.182025-12-09 17:21:52.6720.04000.021.6231.2
EQUIGU2025-12-09 17:21:49.4100.01800.860.042025-12-09 17:21:53.3580.14840.440.9932.0
POPMGU2025-12-09 17:21:49.1600.01800.061.642025-12-09 17:21:54.2700.10530.450.9734.4
ZCCAIV2025-12-09 17:21:52.2510.02001.380.002025-12-09 17:22:00.3650.04003.480.0038.0
CMEIT2025-12-09 17:21:49.9370.0200-0.290.352025-12-09 17:21:56.2440.04000.371.1941.6
GRAMGU2025-12-09 17:21:50.5740.02000.031.702025-12-09 17:21:56.8200.12330.490.8741.6
MAIMGU2025-12-09 17:21:50.3000.0231-0.021.642025-12-09 17:21:55.8300.1304-0.250.7142.7
PLMAIV2025-12-09 17:21:53.0970.0200-0.200.742025-12-09 17:21:59.9100.0400-1.340.0959.0


Local magnitude (ML) calculation results
Station Net Channels Stat. Mag. Wood-And.
Ampl.
Dist. (km) Azimuth
GSCL GUHH0.978.75e-19.846
SARM GUEH0.531.65e-115.8215
VLC MNHH0.639.30e-218.5213
CARD GUHH0.848.37e-230.3184
FIVI GUHN1.041.28e-131.2259
EQUI GUHH0.302.21e-232.0243
POPM GUHH0.821.28e-134.4144
ZCCA IVHH0.603.12e-238.080
CME ITHN0.885.08e-241.6204
GRAM GUHH0.554.30e-241.6302
MAIM GUHH0.632.41e-242.7182
PLMA IVHH0.551.12e-259.0243


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.
(°)
GSCL GUHHZ1.9946e-53.6156e-61.9020e-66.2556e-72.7246e-76.6835e-58.1661e-64.0211e-77.7274e-89.846
GSCL GUHHN6.4697e-51.3338e-56.9788e-62.4320e-61.3917e-61.8129e-43.4755e-52.0883e-63.2328e-79.846
GSCL GUHHE3.8573e-58.1460e-64.8212e-61.3398e-67.9273e-77.4186e-51.8142e-51.1706e-61.9563e-79.846
SARM GUEHZ1.2649e-52.6619e-61.5663e-64.7008e-72.9122e-72.8106e-57.3899e-64.0866e-76.8500e-815.8215
SARM GUEHN1.6545e-52.8481e-61.5023e-66.0716e-72.6427e-72.6817e-56.7951e-63.8741e-76.0762e-815.8215
SARM GUEHE1.3501e-52.3012e-61.2164e-64.5168e-72.3702e-72.3642e-55.5290e-63.5380e-75.9871e-815.8215
ERBM IVEHZ3.0686e-64.0125e-72.7519e-71.0688e-75.1959e-89.1791e-61.2557e-67.5069e-89.7590e-916.4331
ERBM IVEHN3.8141e-66.3325e-73.5955e-71.2112e-75.0751e-81.2300e-51.1545e-66.4593e-81.3098e-816.4331
ERBM IVEHE5.0460e-67.3811e-73.7320e-79.1019e-85.0576e-81.5180e-51.6444e-66.9854e-81.6106e-816.4331
VLC MNHHZ2.1199e-52.0025e-69.3815e-73.0863e-71.8557e-72.5877e-53.7313e-62.8471e-73.9465e-818.5213
VLC MNHHN1.3215e-51.4849e-67.5591e-72.6362e-71.4550e-72.9330e-53.7779e-62.1761e-73.5623e-818.5213
VLC MNHHE1.7747e-51.5987e-68.7010e-72.2091e-71.1820e-71.7772e-53.5170e-61.9223e-73.5119e-818.5213
CARD GUHHZ8.3052e-61.0317e-62.6992e-78.8461e-84.7105e-81.9002e-51.2093e-67.6140e-81.5939e-830.3184
CARD GUHHN1.7307e-51.8567e-66.6014e-71.5728e-78.9378e-82.7610e-51.9838e-61.6209e-73.5061e-830.3184
CARD GUHHE1.2281e-51.7378e-67.3537e-71.9711e-71.0962e-74.1773e-52.4726e-61.8117e-74.1007e-830.3184
FIVI GUHNZ1.4772e-51.8735e-69.5354e-72.9850e-71.6280e-73.0993e-52.6619e-62.5030e-74.1284e-831.2259
FIVI GUHNN1.0971e-52.0107e-61.0910e-63.1422e-71.9601e-72.0840e-53.6797e-62.6126e-74.8057e-831.2259
FIVI GUHNE1.1265e-51.5431e-69.8100e-72.6464e-71.6361e-71.7544e-53.4186e-61.7917e-74.1127e-831.2259
EQUI GUHHZ2.4232e-64.0440e-72.3777e-79.1712e-84.7020e-86.3382e-61.5600e-66.9902e-88.5797e-932.0243
EQUI GUHHN2.4711e-63.7108e-71.7076e-78.0003e-85.2660e-84.7551e-69.4472e-74.4298e-88.4261e-932.0243
EQUI GUHHE2.5147e-63.1768e-71.6384e-77.4483e-84.7255e-86.4428e-68.2108e-75.8363e-87.9528e-932.0243
POPM GUHHZ7.6626e-69.5948e-75.9676e-71.5457e-77.6320e-81.5571e-53.8758e-61.3113e-72.4990e-834.4144
POPM GUHHN7.0908e-61.2635e-68.2484e-72.3792e-71.0187e-72.1598e-52.9134e-61.5626e-73.0231e-834.4144
POPM GUHHE9.7523e-61.7730e-61.0614e-62.9981e-71.7565e-72.1382e-57.2594e-62.7686e-74.9151e-834.4144
ZCCA IVHHZ7.8375e-71.6167e-71.3813e-78.6108e-82.8317e-82.0237e-66.8062e-73.8243e-83.7835e-938.080
ZCCA IVHHN8.9781e-72.3215e-72.1784e-71.3740e-75.3592e-81.8868e-61.7042e-67.6134e-88.6116e-938.080
ZCCA IVHHE1.1038e-62.4240e-72.5450e-71.5617e-74.3600e-81.8081e-61.4280e-65.9124e-87.3169e-938.080
CME ITHNZ3.8251e-64.3491e-73.4389e-72.6593e-71.3612e-75.0908e-62.0214e-61.5600e-71.3718e-841.6204
CME ITHNN4.8878e-65.9359e-74.8198e-73.3108e-71.9402e-77.9257e-62.5268e-62.7689e-71.6372e-841.6204
CME ITHNE4.4523e-65.2652e-73.8936e-72.7751e-71.7985e-75.7371e-62.7252e-62.4433e-71.5531e-841.6204
GRAM GUHHZ1.9775e-62.7354e-71.9496e-74.9890e-82.6547e-83.2802e-61.0954e-63.8356e-87.5656e-941.6302
GRAM GUHHN3.0378e-65.7067e-74.3744e-71.2167e-75.7954e-86.9321e-62.2542e-69.2714e-81.4245e-841.6302
GRAM GUHHE2.1146e-64.5157e-74.1707e-71.4677e-75.5797e-84.6475e-62.6431e-67.6820e-81.2331e-841.6302
MAIM GUHHZ9.3595e-71.4439e-71.0315e-75.4951e-82.4076e-82.9965e-64.5682e-73.3588e-84.3899e-942.7182
MAIM GUHHN1.4648e-62.3393e-71.5646e-76.9078e-83.3003e-83.4504e-68.7886e-74.2846e-86.3500e-942.7182
MAIM GUHHE1.5522e-62.4450e-71.8672e-79.6271e-83.9762e-82.6119e-61.2663e-64.6510e-86.8049e-942.7182
PLMA IVHHZ7.6209e-71.2798e-75.6919e-84.3074e-83.2607e-81.0658e-62.9086e-73.7844e-83.1666e-959.0243
PLMA IVHHN1.3207e-61.7023e-71.0146e-75.5029e-82.9886e-83.8733e-65.6583e-72.9424e-84.5660e-959.0243
PLMA IVHHE1.2516e-61.6615e-79.3056e-86.3039e-83.4697e-83.3655e-64.1764e-74.0138e-84.2915e-959.0243
*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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