RSNI - Manually revised location

MANUAL Location - Area: Appennino forlivese , magnitude (M_L): 1.9
2025-09-28 04:22:28 (UTC)

Regional Seismic Network of Northwestern Italy (Distav, University of Genoa)
Posted on: 2025-09-29 06:58:30

Earthquake info - Manual location

Event - ID :	250928042214
Magnitude (M_L) :	1.9 +/- 0.2
Origin Time :	2025-09-28 04:22:28.407 (UTC)
Location :	Latitude: 43.972 N, Longitude: 11.805 E
Area :	Appennino forlivese
Depth (km) :	27.20
Distances (km) :	2.2 --- Premilcuore 6.4 --- Portico e San Benedetto 8.7 --- Santa Sofia 9.1 --- Galeata 10.5 --- Rocca San Casciano 11.6 --- Civitella di Romagna 13.1 --- Tredozio 15.7 --- San Godenzo 18.1 --- Dovadola 18.6 --- Bagno di Romagna 19.3 --- Marradi 20.4 --- Stia 20.5 --- Predappio 20.8 --- Modigliana 21.3 --- Pratovecchio 22.6 --- Londa 24.2 --- Dicomano 25.1 --- Castrocaro Terme e Terra del Sole 25.4 --- Verghereto 26.0 --- Palazzuolo sul Senio

Quality location estimate: Erh: 2.5 km, Erz: 2.7 km, Nf: 31, Gap: 224 °, 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.
LMD	IV	2025-09-28 04:22:33.500	0.015	0	-1.16	0.09	2025-09-28 04:22:37.701	0.253	7	-1.80	0.06	30.6
RUFI	IV	2025-09-28 04:22:35.680	0.018	0	-0.07	1.54	2025-09-28 04:22:41.310	0.115	3	0.06	1.54	39.0
IMOL	IV	2025-09-28 04:22:37.900	0.025	1	-0.60	0.23	2025-09-28 04:22:46.599	0.152	4	0.00	1.37	51.2
MTRZ	IV	2025-09-28 04:22:39.030	0.027	1	0.10	1.63	2025-09-28 04:22:48.099	0.040	0	0.86	0.16	55.9
OSSC	IV	2025-09-28 04:22:41.291	0.020	0	-0.15	1.26	2025-09-28 04:22:51.351	0.040	0	0.54	0.56	72.6
CSNT	IV	2025-09-28 04:22:41.980	0.036	1	0.25	1.24	2025-09-28 04:22:51.368	0.040	0	0.06	1.39	74.3
ZCCA	IV	2025-09-28 04:22:44.680	0.040	2	0.19	1.38	2025-09-28 04:22:57.976	0.360	7	0.98	0.27	83.2
POPM	GU	2025-09-28 04:22:43.750	0.043	2	0.04	1.57	2025-09-28 04:22:55.022	0.040	0	-0.12	1.18	88.6
BDI	IV	2025-09-28 04:22:45.180	0.054	2	-0.14	1.26	2025-09-28 04:22:57.773	0.130	3	-0.05	1.17	101.1
RAVA	IV	2025-09-28 04:22:48.480	0.020	0	-0.88	0.18	2025-09-28 04:23:03.292	0.040	0	-1.79	0.07	106.4
MAIM	GU	2025-09-28 04:22:46.230	0.053	2	0.06	1.50	2025-09-28 04:22:59.050	0.323	7	-0.27	0.86	108.8
GSCL	GU	2025-09-28 04:22:48.300	0.053	2	0.34	0.99	2025-09-28 04:23:02.563	0.040	0	-0.02	1.15	109.4
PII	IV	2025-09-28 04:22:46.440	0.054	2	0.00	1.49	2025-09-28 04:23:00.137	0.040	0	0.17	1.16	109.7
SARM	GU	2025-09-28 04:22:47.780	0.058	2	0.11	1.44	2025-09-28 04:23:02.140	0.393	8	0.31	0.83	118.0
VLC	MN	2025-09-28 04:22:47.720	0.063	3	0.13	1.42	2025-09-28 04:23:01.210	0.356	7	-0.46	0.69	118.5
SERM	IV	2025-09-28 04:22:48.873	0.020	0	-2.26	0.00	2025-09-28 04:23:05.636	0.040	0	-2.10	0.00	125.3
EQUI	GU	2025-09-28 04:22:49.910	0.129	6	-0.04	1.31	2025-09-28 04:23:07.448	0.040	0	1.81	0.00	136.5

Local magnitude (M_L) calculation results

Station	Net	Channels	Stat. Mag.	Wood-And. Ampl.	Dist. (km)	Azimuth
MTRZ	IV	HH	2.08	4.40e-1	55.9	321
OSSC	IV	HH	1.93	1.78e-1	72.6	222
ZCCA	IV	HH	1.71	7.90e-2	83.2	303
POPM	GU	HH	1.51	8.70e-2	88.6	276
BDI	IV	HH	1.91	1.00e-1	101.1	276
MAIM	GU	HH	1.90	5.81e-2	108.8	267
GSCL	GU	HH	2.02	8.50e-2	109.4	294
PII	IV	HH	1.98	7.65e-2	109.7	255
SARM	GU	EH	1.83	5.43e-2	118.0	282
VLC	MN	HH	1.77	2.74e-2	118.5	281
EQUI	GU	HH	1.91	3.73e-2	136.5	280

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

HHZ

5.2117e-6

1.7404e-6

1.6789e-6

1.4299e-6

5.0396e-7

1.5979e-5

9.6123e-6

5.4920e-7

4.9704e-8

55.9

321

MTRZ

HHN

1.0043e-5

3.3028e-6

3.1962e-6

2.4805e-6

9.8229e-7

1.9890e-5

1.9840e-5

1.2050e-6

1.1115e-7

55.9

321

MTRZ

HHE

4.4154e-6

1.6002e-6

1.5046e-6

9.6985e-7

3.5896e-7

9.2595e-6

8.0285e-6

3.9379e-7

5.2877e-8

55.9

321

OSSC

HHZ

4.1763e-6

9.4077e-7

1.0426e-6

6.1235e-7

3.6707e-7

1.4812e-5

5.7665e-6

5.1610e-7

3.1213e-8

72.6

222

OSSC

HHN

4.0471e-6

1.5668e-6

1.2601e-6

6.2279e-7

2.7472e-7

1.2050e-5

8.0584e-6

3.6408e-7

4.1039e-8

72.6

222

OSSC

HHE

4.6957e-6

1.6240e-6

1.6936e-6

9.1926e-7

3.5965e-7

1.4134e-5

9.4742e-6

4.3829e-7

4.2753e-8

72.6

222

ZCCA

HHZ

8.5727e-7

3.2084e-7

2.9213e-7

2.0178e-7

9.2932e-8

2.6368e-6

2.2940e-6

1.1473e-7

7.9426e-9

83.2

303

ZCCA

HHN

1.1153e-6

4.4468e-7

2.9177e-7

3.0678e-7

1.5271e-7

2.3549e-6

1.6558e-6

1.8599e-7

1.4304e-8

83.2

303

ZCCA

HHE

1.5095e-6

5.4770e-7

4.3678e-7

3.4522e-7

1.9144e-7

2.1176e-6

2.8927e-6

1.8104e-7

1.8773e-8

83.2

303

POPM

HHZ

2.3353e-6

5.7247e-7

5.2947e-7

2.4198e-7

1.0139e-7

8.1612e-6

3.9245e-6

1.4002e-7

1.4078e-8

88.6

276

POPM

HHN

4.3200e-6

1.0085e-6

9.2303e-7

3.2300e-7

1.6245e-7

2.0717e-5

5.4732e-6

1.9219e-7

2.5273e-8

88.6

276

POPM

HHE

3.0157e-6

9.0508e-7

7.5682e-7

2.8045e-7

1.1735e-7

9.6073e-6

5.6385e-6

1.6364e-7

2.2791e-8

88.6

276

BDI

HHZ

2.0531e-6

4.9628e-7

4.5052e-7

1.5779e-7

9.1007e-8

5.7944e-6

3.1161e-6

9.9102e-8

1.2443e-8

101.1

276

BDI

HHN

3.0818e-6

8.3128e-7

7.1434e-7

3.1513e-7

1.3873e-7

1.0497e-5

3.5238e-6

1.8670e-7

2.5382e-8

101.1

276

BDI

HHE

4.0403e-6

9.9755e-7

8.6351e-7

3.6570e-7

1.8320e-7

1.4151e-5

4.5601e-6

2.2620e-7

2.5449e-8

101.1

276

MAIM

HHZ

1.6822e-6

3.9294e-7

3.4121e-7

1.3830e-7

6.8767e-8

4.2783e-6

2.1962e-6

8.5982e-8

1.1010e-8

108.8

267

MAIM

HHN

2.2738e-6

5.8653e-7

4.8696e-7

3.0408e-7

1.2894e-7

7.0285e-6

3.1265e-6

1.6296e-7

1.5304e-8

108.8

267

MAIM

HHE

1.7802e-6

4.5337e-7

4.0392e-7

1.7132e-7

8.7550e-8

7.4623e-6

2.6809e-6

1.0506e-7

1.3005e-8

108.8

267

GSCL

HHZ

7.7810e-7

2.5481e-7

2.5637e-7

1.8039e-7

7.9984e-8

2.1523e-6

1.0229e-6

1.0475e-7

8.6745e-9

109.4

294

GSCL

HHN

1.5641e-6

5.4533e-7

5.1454e-7

4.1973e-7

1.8954e-7

2.2571e-6

2.6628e-6

2.4681e-7

1.7330e-8

109.4

294

GSCL

HHE

9.6388e-7

3.4228e-7

3.5268e-7

3.4752e-7

1.8188e-7

1.7599e-6

1.9959e-6

2.2273e-7

1.5261e-8

109.4

294

PII

HHZ

2.8773e-6

6.5664e-7

4.2647e-7

1.4064e-7

6.3486e-8

7.7227e-6

2.1799e-6

8.4927e-8

1.5144e-8

109.7

255

PII

HHN

2.1752e-6

6.3189e-7

5.9429e-7

2.4007e-7

1.1194e-7

3.9994e-6

3.2427e-6

1.4875e-7

1.7119e-8

109.7

255

PII

HHE

1.8158e-6

5.9351e-7

6.4575e-7

2.5103e-7

9.6532e-8

5.1082e-6

6.3365e-6

1.4391e-7

1.8814e-8

109.7

255

SARM

EHZ

2.0454e-6

3.7879e-7

1.7886e-7

1.0515e-7

3.5947e-8

3.7971e-6

1.0429e-6

4.3824e-8

5.8483e-9

118.0

282

SARM

EHN

1.3036e-6

2.9903e-7

2.8881e-7

2.7011e-7

9.9331e-8

4.5873e-6

9.3118e-7

1.1622e-7

9.6372e-9

118.0

282

SARM

EHE

1.0469e-6

2.5603e-7

2.4382e-7

2.4288e-7

7.5089e-8

2.4863e-6

1.2869e-6

8.6175e-8

7.7926e-9

118.0

282

VLC

HHZ

1.5757e-6

4.9573e-7

2.8701e-7

9.5564e-8

4.7816e-8

5.8221e-6

9.2546e-7

7.3179e-8

1.2104e-8

118.5

281

VLC

HHN

1.0549e-6

2.6568e-7

1.7309e-7

9.6351e-8

4.0946e-8

2.3651e-6

7.6010e-7

4.6977e-8

5.8072e-9

118.5

281

VLC

HHE

1.1959e-6

1.8582e-7

1.4481e-7

7.6450e-8

3.5280e-8

2.5031e-6

7.6646e-7

4.2484e-8

5.0001e-9

118.5

281

EQUI

HHZ

1.6619e-6

2.1938e-7

1.6610e-7

7.1217e-8

3.7626e-8

2.7874e-6

7.4322e-7

5.2984e-8

5.3432e-9

136.5

280

EQUI

HHN

7.4338e-7

1.7777e-7

1.5929e-7

8.7648e-8

4.3342e-8

1.8101e-6

7.6713e-7

4.4287e-8

5.4517e-9

136.5

280

EQUI

HHE

8.1936e-7

1.3240e-7

1.1299e-7

8.8635e-8

6.3838e-8

2.0177e-6

6.2963e-7

8.1215e-8

4.4201e-9

136.5

280

*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)

MANUAL Location - Area: Appennino forlivese , magnitude (ML): 1.9 2025-09-28 04:22:28 (UTC)

MANUAL Location - Area: Appennino forlivese , magnitude (M_L): 1.9
2025-09-28 04:22:28 (UTC)