Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 28-07-2022 and time 14:47:16 (Italy) in region 4 km W Certaldo (FI)

A magnitude ML 1.6 earthquake occured in region: 4 km W Certaldo (FI), on

  • 28-07-2022 12:47:16 (UTC)
  • 28-07-2022 14:47:16 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.5520, 10.9980 at 12 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

Search earthquakes: Any within 30 km radius

The values of hypocentral coordinates and magnitude may be revised at a later time as more information becomes available.

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Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Certaldo FI 4 16121 16121
Gambassi Terme FI 4 4870 20991
Castelfiorentino FI 6 17504 38495
Montaione FI 7 3700 42195
San Gimignano SI 10 7820 50015
Montespertoli FI 12 13537 63552
Barberino Val d'Elsa FI 14 4386 67938
Tavarnelle Val di Pesa FI 14 7800 75738
Poggibonsi SI 15 29196 104934
Colle di Val d'Elsa SI 18 21620 126554
San Miniato PI 18 27934 154488
Palaia PI 19 4612 159100
Empoli FI 19 48109 207209
San Casciano in Val di Pesa FI 19 17062 224271
Montelupo Fiorentino FI 20 14098 238369
Volterra PI 20 10519 248888

Municipalities with at least 50000 inhabitants

An earthquake occurred to
27 Km SW of Scandicci (50609 inhabitants)
32 Km SW of Firenze (382808 inhabitants)
38 Km NW of Siena (53903 inhabitants)
38 Km S of Prato (191150 inhabitants)
43 Km S of Pistoia (90315 inhabitants)
51 Km E of Pisa (89158 inhabitants)
51 Km SE of Lucca (89046 inhabitants)
55 Km E of Livorno (159219 inhabitants)
70 Km SE of Viareggio (62467 inhabitants)
72 Km W of Arezzo (99543 inhabitants)
87 Km SE of Massa (69479 inhabitants)
89 Km N of Grosseto (82087 inhabitants)
93 Km SE of Carrara (63133 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000 		ML 1.6 2022-07-28
12:47:16		 43.5525 10.9975 12 2023-01-31
19:03:46		 Bollettino Sismico Italiano INGV 109933021
Reviewed
Rev100 		ML 1.6 2022-07-28
12:47:16		 43.5507 11.0012 14 2022-07-28
12:57:09		 Sala Sismica INGV-Roma 107793021
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2022-07-28 12:47:16 ± 0.09
Latitude 43.5525 ± 0.0045
Longitude 10.9975 ± 0.0062
Depth (km) 12 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 109933021

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 518
Semi-minor axis of confidence ellipse (meter) 171
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 239
Circular confidence region, given by single value of horizontal uncertainty (meter) 520.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 75
Number of associated phases, regardless of their use for origin computation 57
Number of defining phases 39
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.34
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.86425
Number of stations at which the event was observed 41
Number of stations from which data was used for origin computation 24
Magnitudes information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 38
Type of magnitude ML
Reference to an origin 109933021
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-09-20 14:42:24

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 38
Type of magnitude ML
Reference to an origin 107793021
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2022-07-28 12:57:09
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ILOS.HHZ. 2022-07-28T12:48:56.90 3.0 undecidable manual Pg 10.76 0
IV.GIUL.HHZ. 2022-07-28T12:48:37.39 3.0 undecidable manual Sg 2.37 0
IV.CTI.HHZ. 2022-07-28T12:48:35.27 3.0 undecidable manual Sg 3.13 0
IV.LATB.EHZ. 2022-07-28T12:48:35.09 3.0 undecidable manual Sg 2.1 0
IX.COL3.HHZ.02 2022-07-28T12:48:29.66 3.0 undecidable manual Pg 5.36 0
CH.BNALP.HHZ. 2022-07-28T12:48:20.26 3.0 negative manual Pn 4.59 0
IV.SACR.HHZ. 2022-07-28T12:48:20.78 3.0 positive manual Pg 7.78 0
OT.OT05.EHZ. 2022-07-28T12:48:20.53 3.0 positive manual Pn 1.95 0
IV.MRB1.HNZ. 2022-07-28T12:48:19.09 3.0 undecidable manual Pn 1.59 0
IV.PTRJ.HHZ. 2022-07-28T12:48:18.52 3.0 negative manual Pg 6.63 0
IV.GIUL.HHZ. 2022-07-28T12:48:03.38 3.0 negative manual Pg 2.67 0
IV.GUAR.HHZ. 2022-07-28T12:48:00.02 3.0 negative manual Pg 1.32 0
IV.CAMP.HHZ. 2022-07-28T12:47:52.63 3.0 negative manual Pn -0.52 0
IV.BOB.HHZ. 2022-07-28T12:47:49.47 3.0 undecidable manual Pg 3.21 0
OX.MARN.HHZ. 2022-07-28T12:47:48.98 3.0 undecidable manual Pn -3.88 0
GU.GORR.HHZ. 2022-07-28T12:47:46.00 3.0 undecidable manual Pn 0.2 0
GU.EQUI.HHZ. 2022-07-28T12:47:44.20 0.6 undecidable manual S 316 95.9262 91 -0.73 34
IV.CASP.HHZ. 2022-07-28T12:47:42.10 0.6 undecidable manual S 187 85.1481 91 0.03 44
IV.CELB.HHZ. 2022-07-28T12:47:36.24 3.0 positive manual P -0.69 0
GU.POPM.HHZ. 2022-07-28T12:47:34.70 0.6 undecidable manual S 341 57.8976 91 -0.1 44
GU.EQUI.HHZ. 2022-07-28T12:47:33.43 0.6 undecidable manual P 316 95.9262 91 0.35 41
IV.RUFI.EHZ. 2022-07-28T12:47:33.30 0.3 undecidable manual S 52 51.9036 92 0.12 70
GU.MAIM.HHZ. 2022-07-28T12:47:33.40 0.3 undecidable manual S 315 56.9985 91 -1.14 45
IV.ARCI.HHZ. 2022-07-28T12:47:32.26 0.6 undecidable manual P 153 86.8464 91 0.59 40
IV.CASP.HHZ. 2022-07-28T12:47:32.47 0.1 undecidable manual P 187 85.1481 91 1.04 65
IV.MPPT.EHZ. 2022-07-28T12:47:31.30 0.3 undecidable manual S 9 45.5211 92 -0.2 67
MN.VLC.HHZ. 2022-07-28T12:47:31.40 0.3 undecidable manual P 324 83.1501 91 0.28 64
IV.SFI.EHZ. 2022-07-28T12:47:31.28 0.3 undecidable manual P 60 78.4659 91 0.88 54
IV.PII.HHZ. 2022-07-28T12:47:30.50 0.6 undecidable manual S 297 42.3243 92 -0.14 46
IV.CAFI.HHZ. 2022-07-28T12:47:30.93 0.6 undecidable manual P 107 81.8514 91 0.01 44
IV.MAGO.CHZ. 2022-07-28T12:47:29.80 0.3 undecidable manual S 222 41.3253 92 -0.57 62
IV.FROS.CHZ. 2022-07-28T12:47:29.20 0.3 undecidable manual S 161 40.1265 92 -0.85 55
IV.SEI.HHZ. 2022-07-28T12:47:28.70 3.0 negative manual P -0.93 0
GU.CARD.HHZ. 2022-07-28T12:47:28.53 0.1 undecidable manual P 322 66.7776 91 -0.06 88
GU.POPM.HHZ. 2022-07-28T12:47:27.44 0.1 undecidable manual P 341 57.8976 91 0.21 91
GU.MAIM.HHZ. 2022-07-28T12:47:26.96 0.1 negative manual P 315 56.9985 91 -0.12 89
ZH.T1648.EHZ. 2022-07-28T12:47:26.50 0.3 undecidable manual S 61 26.0517 95 0.19 73
IV.MOCL.EHZ. 2022-07-28T12:47:26.76 0.3 undecidable manual P 16 52.3032 92 0.4 66
IV.RUFI.EHZ. 2022-07-28T12:47:26.66 0.1 undecidable manual P 52 51.9036 92 0.37 89
IV.CRMI.HHZ. 2022-07-28T12:47:26.10 0.3 undecidable manual S 357 27.0507 95 -0.45 64
IV.BOSL.HHZ. 2022-07-28T12:47:26.55 0.3 undecidable manual P 36 51.7038 92 0.28 68
IV.PII.HHZ. 2022-07-28T12:47:25.55 0.1 negative manual P 297 42.3243 92 0.73 82
IV.MPPT.EHZ. 2022-07-28T12:47:25.29 0.1 undecidable manual P 9 45.5211 92 -0.03 92
ZH.T1647.EHZ. 2022-07-28T12:47:25.97 0.6 undecidable manual S 76 25.9518 95 -0.31 45
IV.CSNT.HHZ. 2022-07-28T12:47:25.60 0.3 undecidable manual S 110 25.1526 95 -0.46 65
IV.OSSC.HHZ. 2022-07-28T12:47:24.60 0.3 undecidable manual S 99 20.2686 99 -0.16 71
IV.FROS.CHZ. 2022-07-28T12:47:24.42 0.1 negative manual P 161 40.1265 92 -0.06 93
IV.MAGO.CHZ. 2022-07-28T12:47:24.51 0.1 positive manual P 222 41.3253 92 -0.16 92
IV.CRMI.HHZ. 2022-07-28T12:47:22.33 0.1 positive manual P 357 27.0507 95 -0.14 93
ZH.T1618.HNZ. 2022-07-28T12:47:22.50 0.3 undecidable manual S 71 12.3765 118 -0.25 70
ZH.T1648.EHZ. 2022-07-28T12:47:22.40 0.1 positive manual P 61 26.0517 95 0.07 98
ZH.T1614.EHN. 2022-07-28T12:47:22.24 0.1 undecidable manual P 46 25.752 95 -0.03 96
ZH.T1647.EHZ. 2022-07-28T12:47:22.35 0.1 undecidable manual P 76 25.9518 95 0.04 97
IV.OSSC.HHZ. 2022-07-28T12:47:21.32 0.1 undecidable manual P 99 20.2686 99 -0.11 95
IV.CSNT.HHZ. 2022-07-28T12:47:21.95 0.1 negative manual P 110 25.1526 95 -0.23 92
ZH.T1646.EHZ. 2022-07-28T12:47:20.74 0.1 positive manual P 37 14.7741 109 0.12 100
ZH.T1618.HNZ. 2022-07-28T12:47:20.25 0.1 positive manual P 71 12.3765 118 -0.02 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.OSSC.HHN. ML:1.7 0.00034950000000000004 0.62 AML other m 2022-07-28T12:47:24.68
IV.OSSC.HHE. ML:1.9 0.0006285 1.76 AML other m 2022-07-28T12:47:25.06
ZH.T1646.EHE. ML:1.7 0.00045650000000000004 0.16 AML other m 2022-07-28T12:47:25.73
IV.CSNT.HHN. ML:1.6 0.00022549999999999998 0.18 AML other m 2022-07-28T12:47:25.88
IV.CRMI.HHN. ML:1.6 0.0001905 0.12 AML other m 2022-07-28T12:47:26.22
IV.CSNT.HHE. ML:1.7 0.0002785 0.16 AML other m 2022-07-28T12:47:26.33
IV.PII.HHE. ML:1.6 0.0001285 0.9 AML other m 2022-07-28T12:47:26.96
IV.CRMI.HHE. ML:1.6 0.000193 0.88 AML other m 2022-07-28T12:47:26.27
ZH.T1648.EHN. ML:1.7 0.0002825 0.94 AML other m 2022-07-28T12:47:26.87
ZH.T1648.EHE. ML:1.5 0.0001805 1.5 AML other m 2022-07-28T12:47:27.05
ZH.T1646.EHN. ML:1.9 0.000671 0.4 AML other m 2022-07-28T12:47:29.70
IV.MAGO.CHN. ML:1.7 0.00014800000000000002 0.98 AML other m 2022-07-28T12:47:30.70
IV.MAGO.CHE. ML:1.5 0.00011015 0.22 AML other m 2022-07-28T12:47:30.43
IV.FROS.CHE. ML:2.0 0.00034399999999999996 1.04 AML other m 2022-07-28T12:47:30.42
IV.FROS.CHN. ML:2.2 0.0004985 1.86 AML other m 2022-07-28T12:47:31.95
IV.MPPT.EHE. ML:1.4 0.0000688 0.42 AML other m 2022-07-28T12:47:31.65
IV.PII.HHN. ML:1.8 0.000179 0.24 AML other m 2022-07-28T12:47:32.63
IV.MPPT.EHN. ML:1.2 0.000049699999999999995 0.64 AML other m 2022-07-28T12:47:32.52
IV.RUFI.EHN. ML:1.3 0.0000435 0.52 AML other m 2022-07-28T12:47:33.61
GU.MAIM.HHN. ML:1.6 0.00009120000000000001 0.16 AML other m 2022-07-28T12:47:33.86
GU.MAIM.HHE. ML:1.3 0.0000427 1.12 AML other m 2022-07-28T12:47:34.28
IV.BOSL.HHN. ML:0.9 0.00001835 1.16 AML other m 2022-07-28T12:47:35.15
IV.RUFI.EHE. ML:1.5 0.0000731 0.24 AML other m 2022-07-28T12:47:35.11
GU.POPM.HHN. ML:1.6 0.00009295000000000001 1.84 AML other m 2022-07-28T12:47:35.06
GU.POPM.HHE. ML:1.8 0.00015 0.2 AML other m 2022-07-28T12:47:36.04
IV.MOCL.EHE. ML:1.4 0.00006170000000000001 0.86 AML other m 2022-07-28T12:47:37.00
IV.MOCL.EHN. ML:1.4 0.00006285000000000001 0.64 AML other m 2022-07-28T12:47:37.01
IV.BOSL.HHE. ML:0.8 0.000014100000000000002 0.52 AML other m 2022-07-28T12:47:37.98
IV.SEI.HHE. ML:1.6 0.0000817 0.4 AML other m 2022-07-28T12:47:40.53
IV.SFI.EHE. ML:1.4 0.00003385 0.56 AML other m 2022-07-28T12:47:42.36
IV.CASP.HHE. ML:1.3 0.000026700000000000002 0.78 AML other m 2022-07-28T12:47:44.55
IV.CASP.HHN. ML:1.4 0.000032 1.64 AML other m 2022-07-28T12:47:45.07
IV.SEI.HHN. ML:1.8 0.0001205 0.46 AML other m 2022-07-28T12:47:45.01
IV.CAMP.HHE. ML:2.0 0.00002275 0.54 AML other m 2022-07-28T12:47:57.59
IV.CAMP.HHN. ML:2.3 0.0000428 0.06 AML other m 2022-07-28T12:47:57.36
IV.SFI.EHN. ML:1.2 0.000026299999999999996 0.46 AML other m 2022-07-28T12:48:08.34
IV.BOB.HHE. ML:2.4 0.00008085 0.06 AML other m 2022-07-28T12:48:10.91
IV.BOB.HHN. ML:2.2 0.00005905 0.4 AML other m 2022-07-28T12:48:10.96
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download