RSNI - Manually revised location

MANUAL Location - Area: Appennino pistoiese , magnitude (M_L): 1.3
2026-01-18 17:57:10 (UTC)

Regional Seismic Network of Northwestern Italy (Distav, University of Genoa)
Posted on: 2026-01-19 07:19:26

Earthquake info - Manual location

Event - ID :	260118175642
Magnitude (M_L) :	1.3 +/- 0.1
Origin Time :	2026-01-18 17:57:10.842 (UTC)
Location :	Latitude: 44.004 N, Longitude: 10.958 E
Area :	Appennino pistoiese
Depth (km) :	58.65
Distances (km) :	8.5 --- Pistoia 8.9 --- Montale 10.6 --- Montemurlo 10.8 --- Granaglione 11.7 --- Sambuca Pistoiese 11.9 --- Agliana 12.4 --- Cantagallo 14.3 --- Vaiano 14.5 --- San Marcello Pistoiese 14.6 --- Serravalle Pistoiese 15.5 --- Piteglio 16.8 --- Marliana 16.9 --- Vernio 17.1 --- Porretta Terme 17.4 --- Quarrata 17.6 --- Prato 18.4 --- Lizzano in Belvedere 18.7 --- Monsummano Terme 18.8 --- Castel di Casio 18.9 --- Pieve a Nievole

Quality location estimate: Erh: 2.5 km, Erz: 2.3 km, Nf: 18, Gap: 111 °, Rms: 0.19

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.
POPM	GU	2026-01-18 17:57:20.310	0.046	2	0.26	0.78	2026-01-18 17:57:26.790	0.179	5	0.18	1.01	61.4
CARD	GU	2026-01-18 17:57:21.331	0.020	0	0.08	1.39	2026-01-18 17:57:28.530	0.205	6	-0.11	1.11	70.2
MAIM	GU	2026-01-18 17:57:21.492	0.020	0	-0.02	1.45	2026-01-18 17:57:28.458	0.255	7	-0.73	0.36	70.4
ZCCA	IV	2026-01-18 17:57:22.339	0.020	0	-0.40	0.55	2026-01-18 17:57:31.814	0.040	0	0.03	1.25	70.8
PII	IV	2026-01-18 17:57:22.612	0.020	0	0.15	1.20	2026-01-18 17:57:30.670	0.213	6	-0.46	0.66	75.0
RUFI	IV	2026-01-18 17:57:22.310	0.052	2	-0.10	1.32	2026-01-18 17:57:29.960	0.220	6	-0.97	0.18	75.7
SARM	GU	2026-01-18 17:57:22.370	0.020	0	-0.12	1.28	2026-01-18 17:57:30.690	0.229	6	-0.07	1.07	77.1
OSSC	IV	2026-01-18 17:57:23.629	0.020	0	0.12	1.29	2026-01-18 17:57:32.624	0.040	0	-0.11	1.19	83.0
EQUI	GU	2026-01-18 17:57:24.032	0.020	0	-0.08	1.36	2026-01-18 17:57:32.940	0.493	9	-0.60	0.55	89.1

Local magnitude (M_L) calculation results

Station	Net	Channels	Stat. Mag.	Wood-And. Ampl.	Dist. (km)	Azimuth
POPM	GU	HH	1.36	1.40e-1	61.4	286
CARD	GU	HH	1.59	8.61e-2	70.2	274
MAIM	GU	HH	1.22	3.28e-2	70.4	255
ZCCA	IV	HH	1.15	3.10e-2	70.8	2
PII	IV	HH	1.30	3.88e-2	75.0	228

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.
(°)

POPM

HHZ

1.0911e-5

1.2772e-6

4.8113e-7

1.1133e-7

6.2842e-8

2.0340e-5

2.0973e-6

1.0793e-7

2.5582e-8

61.4

286

POPM

HHN

1.0840e-5

2.2568e-6

1.2686e-6

3.5380e-7

1.7668e-7

2.4412e-5

5.8345e-6

2.6065e-7

4.7192e-8

61.4

286

POPM

HHE

1.1140e-5

1.4828e-6

9.1537e-7

2.1865e-7

1.0704e-7

2.0263e-5

5.0494e-6

1.7029e-7

3.5349e-8

61.4

286

CARD

HHZ

3.4330e-6

4.7962e-7

1.6513e-7

5.4383e-8

2.4265e-8

8.8789e-6

6.5950e-7

4.5810e-8

9.8419e-9

70.2

274

CARD

HHN

1.2378e-5

1.9216e-6

8.1217e-7

2.4375e-7

1.1736e-7

3.8191e-5

4.2618e-6

1.7931e-7

3.6469e-8

70.2

274

CARD

HHE

1.4377e-5

1.5549e-6

6.3094e-7

1.6239e-7

1.0112e-7

2.9128e-5

2.1234e-6

1.6765e-7

3.4667e-8

70.2

274

MAIM

HHZ

2.0937e-6

3.3511e-7

1.3633e-7

5.6418e-8

3.5182e-8

5.4172e-6

4.7192e-7

5.4728e-8

8.9380e-9

70.4

255

MAIM

HHN

3.6231e-6

5.4201e-7

2.4594e-7

1.1647e-7

4.9704e-8

6.9141e-6

8.9987e-7

7.5563e-8

1.2478e-8

70.4

255

MAIM

HHE

3.7584e-6

4.6511e-7

2.0372e-7

7.5526e-8

3.6186e-8

1.2400e-5

1.0191e-6

6.6030e-8

1.2681e-8

70.4

255

ZCCA

HHZ

6.0535e-7

1.1251e-7

9.4404e-8

5.4882e-8

2.4407e-8

1.1983e-6

5.0230e-7

3.5547e-8

3.1126e-9

70.8

ZCCA

HHN

8.5494e-7

1.9656e-7

1.7060e-7

1.2238e-7

7.9092e-8

9.1124e-7

1.5278e-6

1.0077e-7

7.8720e-9

70.8

ZCCA

HHE

6.3888e-7

2.3640e-7

1.9531e-7

2.0738e-7

6.8102e-8

8.2811e-7

1.1862e-6

8.1686e-8

8.5223e-9

70.8

PII

HHZ

2.2962e-6

3.3180e-7

1.6032e-7

4.1440e-8

2.2237e-8

4.0485e-6

1.0487e-6

3.6534e-8

5.2751e-9

75.0

228

PII

HHN

1.7612e-6

3.4463e-7

2.6402e-7

1.1723e-7

5.0700e-8

4.0925e-6

1.8946e-6

7.5915e-8

1.1053e-8

75.0

228

PII

HHE

2.1336e-6

3.3542e-7

2.5516e-7

1.0249e-7

4.6644e-8

3.5322e-6

1.4569e-6

6.9940e-8

9.8352e-9

75.0

228

SARM

EHZ

3.7894e-7

6.8824e-8

3.3656e-8

1.6998e-8

8.5527e-9

8.6230e-7

1.9824e-7

1.0518e-8

1.7150e-9

77.1

294

SARM

EHN

5.5551e-7

7.6812e-8

5.9231e-8

4.9760e-8

2.5819e-8

1.4562e-6

2.4081e-7

3.2357e-8

3.0338e-9

77.1

294

SARM

EHE

5.5439e-7

7.1077e-8

4.5296e-8

2.7955e-8

1.6135e-8

8.2293e-7

2.3795e-7

2.0875e-8

1.8616e-9

77.1

294

OSSC

HHZ

4.5886e-7

6.1144e-8

5.3112e-8

2.7848e-8

1.3530e-8

8.5724e-7

2.8636e-7

1.7278e-8

1.7637e-9

83.0

156

OSSC

HHN

4.5746e-7

1.0240e-7

7.9331e-8

3.7749e-8

1.7434e-8

1.1894e-6

3.8971e-7

2.5847e-8

2.9610e-9

83.0

156

OSSC

HHE

4.7742e-7

1.0307e-7

9.1338e-8

4.2526e-8

1.9992e-8

1.6266e-6

4.4894e-7

2.6957e-8

3.5736e-9

83.0

156

EQUI

HHZ

7.8479e-7

7.1695e-8

4.1454e-8

1.6704e-8

1.2689e-8

1.4070e-6

2.0014e-7

1.9545e-8

2.1772e-9

89.1

286

EQUI

HHN

1.0686e-6

1.0632e-7

5.1214e-8

2.7914e-8

1.8371e-8

1.2570e-6

3.2850e-7

2.6281e-8

2.5527e-9

89.1

286

EQUI

HHE

8.6212e-7

9.0803e-8

4.8665e-8

2.3683e-8

1.6830e-8

1.9632e-6

3.2129e-7

2.3534e-8

2.5166e-9

89.1

286

*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 pistoiese , magnitude (ML): 1.3 2026-01-18 17:57:10 (UTC)

MANUAL Location - Area: Appennino pistoiese , magnitude (M_L): 1.3
2026-01-18 17:57:10 (UTC)