MANUAL Location - Area: Appennino ligure , magnitude (ML): 2.3
2025-07-02 05:07:21 (UTC)

Regional Seismic Network of Northwestern Italy (Distav, University of Genoa)
Posted on: 2025-07-02 07:46:58

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Earthquake info - Manual location
Event - ID :250702050659
Magnitude (ML) :2.3 +/- 0.2
Origin Time :2025-07-02 05:07:21.753 (UTC)
Location : Latitude: 44.833 N, Longitude: 8.998 E
Area :Appennino ligure
Depth (km) :11.09
Distances (km) : 0.7 --- Casasco
1.9 --- Montemarzino
3.1 --- Momperone
3.4 --- Montegioco
4.0 --- Brignano-Frascata
4.0 --- Avolasca
5.4 --- Cerreto Grue
5.6 --- Garbagna
5.7 --- Pozzol Groppo
5.9 --- Costa Vescovato
6.2 --- Monleale
6.3 --- Berzano di Tortona
6.5 --- Castellania
6.5 --- Volpedo
6.9 --- Cecima
7.4 --- San Sebastiano Curone
7.4 --- Volpeglino
7.9 --- Sarezzano
8.0 --- Sant Agata Fossili
8.2 --- Carezzano

Quality location estimate: Erh: 0.8 km, Erz: 1.7 km, Nf: 42, Gap: 84 °, Rms: 0.30


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.
SARZIV2025-07-02 05:07:25.5330.02000.830.35--:---.-----.---.-- 13.5
RNSIT2025-07-02 05:07:27.4060.08030.231.282025-07-02 05:07:31.5430.13030.281.2129.2
GORRGU2025-07-02 05:07:28.5600.0562-0.061.292025-07-02 05:07:34.0740.2005-0.091.1536.1
TGLIT2025-07-02 05:07:28.6990.1004-0.220.96--:---.-----.---.-- 37.4
RNCAGU2025-07-02 05:07:29.2300.02110.001.372025-07-02 05:07:35.0800.14640.271.2041.9
PCPGU2025-07-02 05:07:30.1800.0251-0.320.692025-07-02 05:07:36.7000.1925-0.091.1449.7
ROTMGU2025-07-02 05:07:32.4400.02610.720.51--:---.-----.---.-- 52.1
MSSAIV2025-07-02 05:07:34.3300.03610.001.35--:---.-----.---.-- 71.4
GRAMGU2025-07-02 05:07:38.5600.04620.251.242025-07-02 05:07:50.6600.2787-0.220.8693.3
ROROGU2025-07-02 05:07:40.7900.07430.530.822025-07-02 05:07:54.1700.32970.390.89109.5
PLMAIV2025-07-02 05:07:40.8800.05520.111.312025-07-02 05:07:54.0000.4919-0.210.75110.9
GBOSGU2025-07-02 05:07:41.1700.06230.071.30--:---.-----.---.-- 113.4
EQUIGU2025-07-02 05:07:42.5500.06430.361.082025-07-02 05:07:56.8900.4449-0.180.78118.3
MDIIV2025-07-02 05:07:43.2100.05920.201.24--:---.-----.---.-- 118.8
OROIV2025-07-02 05:07:42.5300.06020.261.202025-07-02 05:07:58.2000.35970.290.89119.5
ERBMIV2025-07-02 05:07:44.0300.06130.440.97--:---.-----.---.-- 121.5
MUGIOCH2025-07-02 05:07:43.0550.0613-0.191.012025-07-02 05:07:59.1600.2506-0.330.74121.7
MGROGU2025-07-02 05:07:44.0600.06530.311.14--:---.-----.---.-- 129.4
SARMGU2025-07-02 05:07:44.9600.06630.041.24--:---.-----.---.-- 133.0
VLCMN2025-07-02 05:07:44.9600.06730.261.18--:---.-----.---.-- 133.5
BHBGU2025-07-02 05:07:44.7700.07330.011.232025-07-02 05:08:01.8460.2506-0.040.92137.2
RSPGU2025-07-02 05:07:44.8600.0753-0.360.72--:---.-----.---.-- 141.1
BIGNGU2025-07-02 05:07:46.4500.07430.690.60--:---.-----.---.-- 146.9
STVGU2025-07-02 05:07:47.1300.07430.560.80--:---.-----.---.-- 148.1
CARDGU2025-07-02 05:07:47.3000.07430.670.65--:---.-----.---.-- 148.4
PZZGU2025-07-02 05:07:46.8300.0773-0.550.43--:---.-----.---.-- 153.5
MAIMGU2025-07-02 05:07:48.1300.07830.371.05--:---.-----.---.-- 156.9


Local magnitude (ML) calculation results
Station Net Channels Stat. Mag. Wood-And.
Ampl.		 Dist. (km) Azimuth
RNS ITHN2.352.92e+029.2191
GORR GUHH2.392.13e+036.1137
RNCA GUHH2.047.08e-141.9185
GRAM GUHH2.142.96e-193.3114
RORO GUHH2.151.14e-1109.5223
PLMA IVHH2.381.84e-1110.9142
EQUI GUHH2.251.16e-1118.3129
MUGIOCHHH2.721.50e-1121.72
BHB GUHH2.601.63e-1137.2271


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.
(°)
RNS ITHNZ6.8570e-51.8244e-51.7018e-56.3282e-63.0403e-61.6014e-41.1624e-44.0837e-65.2458e-729.2191
RNS ITHNN1.0989e-43.1145e-52.6195e-59.7235e-64.2057e-61.9939e-41.6148e-45.9937e-68.7472e-729.2191
RNS ITHNE9.9986e-53.2798e-52.4566e-51.1279e-53.9460e-62.4747e-41.2454e-45.6099e-67.4449e-729.2191
GORR GUHHZ4.6486e-51.1077e-51.1650e-56.6771e-63.2738e-61.3716e-46.2187e-54.8762e-64.3700e-736.1137
GORR GUHHN6.5357e-51.3033e-51.4200e-57.6551e-62.9491e-62.0199e-45.5880e-53.9014e-64.5572e-736.1137
GORR GUHHE6.1466e-51.9037e-51.8844e-51.0348e-54.0035e-61.9232e-41.5038e-44.8100e-64.7031e-736.1137
RNCA GUHHZ3.3779e-55.7668e-64.0363e-62.7006e-61.7528e-69.8522e-51.8311e-52.6013e-62.2467e-741.9185
RNCA GUHHN2.9037e-55.3799e-64.5358e-62.1225e-61.0290e-67.9219e-52.1350e-51.3727e-61.7365e-741.9185
RNCA GUHHE4.9165e-59.8066e-65.9901e-62.4157e-61.0359e-61.5903e-42.6549e-51.6591e-62.7486e-741.9185
PCP GUHHZ1.2885e-52.7527e-62.2761e-61.0835e-64.0534e-73.5658e-51.6266e-55.3895e-77.0641e-849.7228
PCP GUHHN1.5184e-53.0646e-62.3634e-61.0580e-64.6539e-76.8912e-51.5118e-55.2733e-78.3583e-849.7228
PCP GUHHE1.2722e-52.5668e-62.0400e-67.0475e-73.2575e-73.5940e-59.4259e-64.5288e-76.7660e-849.7228
GRAM GUHHZ8.5838e-61.3147e-61.1165e-65.2163e-72.5825e-71.4233e-55.9400e-62.9240e-73.3829e-893.3114
GRAM GUHHN7.5163e-62.4210e-62.1994e-68.1883e-73.9495e-72.0893e-51.5088e-55.4436e-75.9309e-893.3114
GRAM GUHHE8.4952e-62.3038e-62.3717e-69.6765e-75.3737e-71.7897e-51.3066e-57.3652e-77.2929e-893.3114
RORO GUHHZ4.0160e-68.3839e-77.9994e-74.2887e-71.4609e-71.4255e-53.7898e-61.8532e-72.2220e-8109.5223
RORO GUHHN5.7092e-61.4746e-61.1641e-64.6095e-71.9625e-71.8510e-56.0969e-62.5721e-74.1556e-8109.5223
RORO GUHHE4.2796e-61.0260e-68.7077e-73.4160e-71.6231e-71.5004e-54.6909e-61.9732e-72.7444e-8109.5223
PLMA IVHHZ1.6802e-52.0009e-61.1992e-64.5445e-72.1238e-71.9718e-54.7278e-62.3504e-73.7716e-8110.9142
PLMA IVHHN1.0546e-52.4773e-61.9130e-66.7140e-73.5171e-73.3886e-58.1686e-64.9677e-76.6601e-8110.9142
PLMA IVHHE1.0539e-52.8107e-61.5855e-65.2474e-72.7488e-73.1556e-56.3791e-63.6750e-76.3481e-8110.9142
EQUI GUHHZ5.9316e-68.8445e-76.7768e-73.3507e-71.5122e-71.8695e-54.6007e-61.9823e-72.6147e-8118.3129
EQUI GUHHN3.8589e-69.3785e-78.8038e-75.0762e-72.2513e-71.6119e-55.7783e-62.8503e-73.2170e-8118.3129
EQUI GUHHE6.1027e-69.5332e-77.0922e-72.7213e-71.1728e-71.0059e-54.4221e-61.5077e-72.7110e-8118.3129
ORO IVEHZ3.0497e-55.0931e-63.6995e-69.0145e-75.2818e-71.0394e-42.2991e-57.9705e-71.1520e-7119.5318
ORO IVEHN3.0478e-56.6794e-65.6363e-61.9453e-67.7121e-77.8414e-53.2518e-59.4530e-71.5400e-7119.5318
ORO IVEHE3.9978e-58.3157e-65.9964e-62.3386e-61.2134e-67.8800e-53.4689e-51.7493e-62.8487e-7119.5318
MUGIOCHHHZ8.5758e-61.7403e-61.0871e-64.1516e-71.9110e-71.9957e-54.6230e-62.3896e-73.7838e-8121.72
MUGIOCHHHN9.1142e-61.9278e-61.5752e-65.4701e-72.3219e-71.8132e-59.2165e-63.2260e-74.3556e-8121.72
MUGIOCHHHE6.7627e-61.5972e-61.3252e-66.9543e-72.8903e-72.3761e-59.2155e-63.4963e-74.7762e-8121.72
BHB GUHHZ6.3652e-61.0446e-66.5796e-72.6619e-71.0661e-72.2740e-53.1124e-61.5857e-72.1518e-8137.2271
BHB GUHHN8.0734e-61.8429e-61.4409e-64.3847e-72.1666e-71.5522e-56.6682e-62.9664e-74.5343e-8137.2271
BHB GUHHE7.7398e-61.8025e-61.2603e-63.7330e-72.2102e-71.8789e-55.4894e-63.1656e-74.1214e-8137.2271
*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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