RSNI - Manually revised location

MANUAL Location - Area: Zona Chianti , magnitude (M_L): 1.6
2025-02-03 23:03:49 (UTC)

Regional Seismic Network of Northwestern Italy (Distav, University of Genoa)
Posted on: 2025-02-04 09:09:48

Earthquake info - Manual location

Event - ID :	250203230338
Magnitude (M_L) :	1.6 +/- 0.1
Origin Time :	2025-02-03 23:03:49.377 (UTC)
Location :	Latitude: 43.301 N, Longitude: 11.396 E
Area :	Zona Chianti
Depth (km) :	4.79
Distances (km) :	6.0 --- Siena 7.9 --- Monteroni d Arbia 10.1 --- Castelnuovo Berardenga 13.8 --- Sovicille 14.4 --- Murlo 15.1 --- Asciano 16.9 --- Rapolano Terme 17.3 --- Monteriggioni 18.9 --- Gaiole in Chianti 19.3 --- Buonconvento 20.8 --- Castellina in Chianti 20.9 --- Radda in Chianti 22.7 --- San Giovanni d Asso 24.9 --- Monticiano 25.2 --- Trequanda 25.7 --- Colle di Val d Elsa 25.9 --- Cavriglia 26.7 --- Bucine 26.9 --- Monte San Savino 27.7 --- Poggibonsi

Quality location estimate: Erh: 1.5 km, Erz: 2 km, Nf: 22, Gap: 288 °, Rms: 0.15

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.
CSNT	IV	2025-02-03 23:03:54.100	0.011	0	-0.01	2.00	2025-02-03 23:03:57.580	0.064	1	0.02	1.77	21.6
OSSC	IV	2025-02-03 23:03:55.202	0.020	0	0.00	1.98	2025-02-03 23:03:59.432	0.040	0	0.03	1.74	28.0
RUFI	IV	2025-02-03 23:04:01.290	0.030	1	0.08	1.57	2025-02-03 23:04:09.450	0.181	5	-0.06	1.15	60.6
SEI	IV	2025-02-03 23:04:05.889	0.020	0	0.64	0.18	2025-02-03 23:04:16.770	0.251	7	-0.51	0.55	84.0
PII	IV	2025-02-03 23:04:04.520	0.042	2	-0.04	1.49	2025-02-03 23:04:14.000	0.468	9	-1.48	0.12	84.5
LMD	IV	2025-02-03 23:04:06.140	0.045	2	-0.50	0.37	2025-02-03 23:04:17.380	0.270	7	-1.83	0.06	90.0
POPM	GU	2025-02-03 23:04:06.971	0.020	0	-0.01	1.44	2025-02-03 23:04:20.469	0.040	0	0.55	0.44	97.5
MAIM	GU	2025-02-03 23:04:07.060	0.050	2	0.15	1.21	2025-02-03 23:04:18.470	0.630	9	-1.06	0.30	99.8
BDI	IV	2025-02-03 23:04:08.470	0.053	2	0.02	1.37	2025-02-03 23:04:22.142	0.040	0	-0.22	0.91	106.4
CARD	GU	2025-02-03 23:04:08.620	0.054	2	0.08	1.31	2025-02-03 23:04:22.426	0.040	0	0.02	1.04	109.2
SARM	GU	2025-02-03 23:04:11.345	0.100	4	-0.24	0.94	2025-02-03 23:04:29.038	0.040	0	1.22	0.06	126.7

Local magnitude (M_L) calculation results

Station	Net	Channels	Stat. Mag.	Wood-And. Ampl.	Dist. (km)	Azimuth
OSSC	IV	HH	1.73	7.56e-1	28.0	334
PII	IV	HH	1.49	4.61e-2	84.5	304
POPM	GU	HH	1.37	5.11e-2	97.5	328
MAIM	GU	HH	1.70	4.50e-2	99.8	313
BDI	IV	HH	1.58	4.16e-2	106.4	323
CARD	GU	HH	1.73	4.32e-2	109.2	318
SARM	GU	EH	1.76	3.81e-2	126.7	321

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.
(°)

OSSC

HHZ

3.8673e-5

6.2629e-6

3.9262e-6

1.3908e-6

5.9719e-7

1.7020e-4

1.4960e-5

8.4085e-7

1.4440e-7

28.0

334

OSSC

HHN

8.0318e-5

1.3801e-5

7.6263e-6

2.3652e-6

1.0125e-6

2.5044e-4

3.6159e-5

1.4972e-6

3.1337e-7

28.0

334

OSSC

HHE

5.9939e-5

9.7729e-6

7.3315e-6

2.7067e-6

1.3045e-6

2.2629e-4

2.4476e-5

1.8400e-6

2.6076e-7

28.0

334

SEI

HHZ

6.7125e-6

1.9844e-6

1.6609e-6

6.2695e-7

2.8819e-7

1.3263e-5

1.1590e-5

3.9357e-7

5.2866e-8

84.0

358

SEI

HHN

1.1222e-5

3.9300e-6

4.0726e-6

2.6803e-6

8.6128e-7

1.8620e-5

1.9329e-5

1.0280e-6

1.5044e-7

84.0

358

SEI

HHE

6.3785e-6

1.9963e-6

1.9144e-6

1.0227e-6

5.6354e-7

1.7200e-5

9.8003e-6

8.4490e-7

6.4506e-8

84.0

358

PII

HHZ

1.4228e-6

3.0919e-7

2.9906e-7

1.2807e-7

4.7560e-8

3.8504e-6

1.2581e-6

5.8392e-8

8.3814e-9

84.5

304

PII

HHN

1.2329e-6

3.4349e-7

4.0585e-7

2.0624e-7

6.4802e-8

3.0743e-6

2.8287e-6

8.1743e-8

1.0890e-8

84.5

304

PII

HHE

1.8337e-6

5.1591e-7

4.0907e-7

1.8653e-7

6.0834e-8

4.1626e-6

1.9098e-6

8.3003e-8

1.5010e-8

84.5

304

POPM

HHZ

1.2992e-6

2.8588e-7

2.7664e-7

1.1079e-7

4.5466e-8

4.1483e-6

1.4965e-6

6.1932e-8

7.7809e-9

97.5

328

POPM

HHN

1.9516e-6

5.0653e-7

4.7412e-7

1.5129e-7

7.5267e-8

5.5703e-6

2.9053e-6

1.0941e-7

1.5118e-8

97.5

328

POPM

HHE

1.6942e-6

5.6548e-7

4.8734e-7

1.8123e-7

7.8230e-8

3.4407e-6

2.9484e-6

1.0032e-7

1.3919e-8

97.5

328

MAIM

HHZ

9.3189e-7

2.1167e-7

2.1600e-7

1.2725e-7

4.8039e-8

4.1475e-6

1.1968e-6

5.5355e-8

5.8306e-9

99.8

313

MAIM

HHN

1.2625e-6

3.4366e-7

3.7491e-7

2.5664e-7

7.0544e-8

5.9069e-6

1.7576e-6

9.3221e-8

1.1766e-8

99.8

313

MAIM

HHE

1.1885e-6

2.7133e-7

2.1836e-7

1.3819e-7

5.9444e-8

5.5518e-6

9.0411e-7

5.6173e-8

6.4358e-9

99.8

313

BDI

HHZ

1.3647e-6

2.3661e-7

2.1989e-7

1.1754e-7

4.8397e-8

2.3246e-6

9.5057e-7

6.3949e-8

6.2816e-9

106.4

323

BDI

HHN

1.3995e-6

2.2481e-7

2.4766e-7

1.4318e-7

6.0404e-8

3.2212e-6

1.5619e-6

7.6071e-8

8.8589e-9

106.4

323

BDI

HHE

9.2441e-7

2.7438e-7

2.7322e-7

1.2410e-7

5.6913e-8

3.8306e-6

2.1578e-6

7.6222e-8

7.1960e-9

106.4

323

CARD

HHZ

1.5700e-6

2.9223e-7

2.4157e-7

1.2002e-7

4.4227e-8

2.8735e-6

1.4455e-6

5.0653e-8

7.3193e-9

109.2

318

CARD

HHN

1.9532e-6

3.8314e-7

3.3330e-7

1.0527e-7

4.9220e-8

5.3752e-6

2.2686e-6

7.5632e-8

1.0652e-8

109.2

318

CARD

HHE

2.6378e-6

5.1241e-7

4.0721e-7

2.0314e-7

7.3762e-8

5.8637e-6

2.0660e-6

9.0514e-8

1.2971e-8

109.2

318

SARM

EHZ

3.8923e-7

8.7825e-8

8.2786e-8

5.0863e-8

2.3517e-8

8.9106e-7

4.0717e-7

3.2066e-8

2.6860e-9

126.7

321

SARM

EHN

4.9332e-7

1.2920e-7

1.1839e-7

9.2816e-8

3.6308e-8

8.5950e-7

4.4448e-7

4.2460e-8

3.5951e-9

126.7

321

SARM

EHE

4.5751e-7

1.2448e-7

9.6616e-8

7.6934e-8

2.6523e-8

9.3954e-7

3.9391e-7

3.1719e-8

3.6115e-9

126.7

321

*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: Zona Chianti , magnitude (ML): 1.6 2025-02-03 23:03:49 (UTC)

MANUAL Location - Area: Zona Chianti , magnitude (M_L): 1.6
2025-02-03 23:03:49 (UTC)