MANUAL Location - Area: Appennino forlivese , magnitude (ML): 2.9
2025-08-15 12:15:45 (UTC)

Regional Seismic Network of Northwestern Italy (Distav, University of Genoa)
Posted on: 2025-08-15 20:02:19

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Earthquake info - Manual location
Event - ID :250815121423
Magnitude (ML) :2.9 +/- 0.2
Origin Time :2025-08-15 12:15:45.151 (UTC)
Location : Latitude: 44.132 N, Longitude: 11.687 E
Area :Appennino forlivese
Depth (km) :16.04
Distances (km) : 7.3 --- Tredozio
8.5 --- Marradi
9.0 --- Modigliana
11.3 --- Palazzuolo sul Senio
11.4 --- Casola Valsenio
12.4 --- Brisighella
14.0 --- Portico e San Benedetto
14.7 --- Rocca San Casciano
16.0 --- Dovadola
16.3 --- Riolo Terme
17.1 --- Castel del Rio
17.5 --- Fontanelice
18.2 --- Borgo Tossignano
18.5 --- Premilcuore
19.4 --- Casalfiumanese
21.3 --- Castrocaro Terme e Terra del Sole
22.7 --- Castel Bolognese
23.3 --- Faenza
23.4 --- Galeata
23.4 --- San Godenzo

Quality location estimate: Erh: 2.1 km, Erz: 2.2 km, Nf: 24, Gap: 262 °, 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.
MTRZIV2025-08-15 12:15:52.0400.01300.510.562025-08-15 12:15:56.8080.04000.051.6133.4
ZCCAIV2025-08-15 12:15:57.7900.0321-0.101.522025-08-15 12:16:08.3230.04000.121.3963.8
POPMGU2025-08-15 12:15:58.7200.0331-0.141.422025-08-15 12:16:08.4960.0400-0.700.4176.7
GSCLGU2025-08-15 12:16:03.0580.02000.121.452025-08-15 12:16:16.1770.0400-0.211.1592.3
CARDGU2025-08-15 12:16:02.8900.33290.211.122025-08-15 12:16:14.8100.2727-0.680.5798.3
CAVEIV2025-08-15 12:16:05.9670.0200-0.181.292025-08-15 12:16:20.6110.0400-1.460.1999.2
MAIMGU2025-08-15 12:16:03.1200.04520.021.532025-08-15 12:16:14.7800.0400-1.410.1999.9
SERMIV2025-08-15 12:16:06.0000.0552-0.031.462025-08-15 12:16:21.8160.8839-0.120.68103.6
SARMGU2025-08-15 12:16:03.4000.0613-0.520.562025-08-15 12:16:18.2830.04000.480.80104.1
PIIIV2025-08-15 12:16:04.1000.05320.121.442025-08-15 12:16:15.8910.0400-1.790.13104.9
VLCMN2025-08-15 12:16:04.0600.11950.141.392025-08-15 12:16:17.8460.04000.101.26105.1
EQUIGU2025-08-15 12:16:08.1900.06131.670.002025-08-15 12:16:22.0430.0400-0.051.20123.5
GRAMGU2025-08-15 12:16:10.3320.02000.530.692025-08-15 12:16:31.9560.04004.230.00136.0


Local magnitude (ML) calculation results
Station Net Channels Stat. Mag. Wood-And.
Ampl.		 Dist. (km) Azimuth
MTRZ IVHH3.251.80e+133.4314
ZCCA IVHH2.591.06e+063.8293
POPM GUHH2.732.03e+076.7263
GSCL GUHH2.919.90e-192.3286
CARD GUHH2.837.05e-198.3263
MAIM GUHH2.856.32e-199.9256
SARM GUEH2.969.91e-1104.1274
PII IVHH2.724.68e-1104.9244
VLC MNHH3.026.54e-1105.1272
EQUI GUHH2.803.71e-1123.5272
GRAM GUHH3.069.61e-1136.0288


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.
(°)
MTRZ IVHHZ6.9134e-53.2295e-53.8818e-54.5903e-53.1317e-51.6119e-42.5295e-44.6449e-51.5625e-633.4314
MTRZ IVHHN2.2469e-41.1296e-41.1610e-41.1772e-46.5569e-54.1495e-45.5002e-47.3791e-55.0968e-633.4314
MTRZ IVHHE5.7106e-53.1853e-52.6227e-54.0127e-51.9376e-51.3605e-41.4369e-42.4308e-51.3533e-633.4314
ZCCA IVHHZ6.9080e-64.3044e-63.0521e-64.6851e-64.2403e-61.4645e-52.1416e-57.9056e-62.7594e-763.8293
ZCCA IVHHN7.7637e-66.2348e-64.2948e-66.3014e-64.5014e-69.5222e-62.1181e-56.3822e-63.0559e-763.8293
ZCCA IVHHE7.7414e-66.1842e-64.5465e-66.0625e-63.3721e-68.5556e-62.5928e-54.9549e-62.5145e-763.8293
POPM GUHHZ1.6834e-51.0079e-57.5744e-61.4324e-56.3856e-62.9025e-54.5848e-56.8037e-65.4258e-776.7263
POPM GUHHN2.8900e-51.4234e-51.3112e-51.4665e-59.4973e-65.3927e-57.1936e-51.2363e-55.7335e-776.7263
POPM GUHHE1.9704e-56.9833e-67.5674e-67.2913e-63.5347e-65.2629e-54.1160e-54.2091e-63.0667e-776.7263
GSCL GUHHZ4.1553e-62.7740e-61.7563e-63.1574e-63.0181e-68.4064e-69.0124e-63.9305e-61.6516e-792.3286
GSCL GUHHN8.7460e-66.4935e-64.1247e-65.1700e-64.1743e-69.9455e-63.0350e-56.9419e-63.6653e-792.3286
GSCL GUHHE6.5872e-65.6872e-63.8978e-65.5366e-64.4085e-68.2945e-62.4737e-56.2355e-62.8189e-792.3286
CARD GUHHZ4.5254e-63.1001e-62.2661e-63.3684e-62.3395e-69.9587e-61.2368e-53.4076e-61.6720e-798.3263
CARD GUHHN1.1167e-53.7036e-63.5447e-64.6478e-62.6350e-63.7188e-51.9475e-53.0767e-61.7581e-798.3263
CARD GUHHE9.2160e-64.4216e-63.4388e-64.5091e-63.0777e-62.6739e-51.6854e-52.7568e-62.3882e-798.3263
MAIM GUHHZ4.1108e-62.5660e-62.0835e-62.9344e-61.7873e-67.1245e-61.2600e-52.9331e-61.1726e-799.9256
MAIM GUHHN4.5146e-63.6944e-62.6084e-63.6037e-62.5010e-68.0504e-61.1871e-53.5814e-61.7626e-799.9256
MAIM GUHHE4.2820e-63.2459e-62.2240e-62.9024e-61.4710e-69.5285e-69.3101e-62.1237e-61.1774e-799.9256
SARM GUEHZ3.2450e-62.3161e-61.6602e-62.6167e-62.0036e-64.7868e-67.5332e-62.8904e-61.2136e-7104.1274
SARM GUEHN5.9029e-64.3006e-63.1494e-65.1188e-62.2527e-66.3026e-68.5665e-62.6663e-61.9078e-7104.1274
SARM GUEHE7.0113e-65.6120e-63.1454e-65.1433e-63.2286e-67.4949e-62.0444e-54.5868e-62.6885e-7104.1274
PII IVHHZ6.7439e-61.5041e-61.5505e-61.2787e-61.0355e-61.5612e-56.9255e-61.8004e-67.3976e-8104.9244
PII IVHHN4.3748e-62.4909e-62.4619e-63.0084e-61.9935e-66.4595e-61.5627e-52.6231e-61.4668e-7104.9244
PII IVHHE5.1506e-63.3467e-62.7346e-62.7063e-61.9683e-67.1094e-61.1809e-53.3928e-61.4001e-7104.9244
VLC MNHHZ3.0478e-62.2433e-61.1504e-61.7656e-61.9969e-68.0408e-66.1758e-62.8645e-61.2357e-7105.1272
VLC MNHHN4.0391e-64.2989e-61.7815e-62.8908e-63.2386e-66.3724e-69.6882e-64.7631e-63.3859e-7105.1272
VLC MNHHE2.6670e-62.0676e-68.4632e-71.3247e-61.4196e-64.6699e-64.2541e-61.4869e-61.2351e-7105.1272
EQUI GUHHZ1.6597e-69.2253e-75.6044e-78.2524e-77.6515e-75.3701e-63.0207e-61.1751e-65.4153e-8123.5272
EQUI GUHHN2.4632e-61.7970e-67.6578e-71.6423e-61.7082e-64.0681e-64.5556e-62.0463e-61.1542e-7123.5272
EQUI GUHHE1.4435e-61.2577e-67.7480e-71.1900e-69.5324e-73.5045e-63.5981e-61.3873e-68.2869e-8123.5272
GRAM GUHHZ3.3705e-61.5846e-61.4984e-61.6005e-61.4368e-66.7112e-67.9736e-61.7986e-68.6229e-8136.0288
GRAM GUHHN4.2004e-62.3734e-61.8884e-61.9741e-61.1206e-65.9007e-61.1770e-51.4718e-68.9483e-8136.0288
GRAM GUHHE4.0269e-61.8815e-62.1864e-61.7597e-61.2434e-66.1490e-61.7758e-52.0582e-68.6825e-8136.0288
*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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