Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.8 on date 18-01-2020 and time 19:21:29 (Italy) in region 3 km SE Montelupo Fiorentino (FI)

A magnitude ML 0.8 earthquake occured in region: 3 km SE Montelupo Fiorentino (FI), on

  • 18-01-2020 18:21:29 (UTC)
  • 18-01-2020 19:21:29 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.7060, 11.0320 at 11 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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
Montelupo Fiorentino FI 3 14098 14098
Capraia e Limite FI 6 7670 21768
Empoli FI 7 48109 69877
Montespertoli FI 8 13537 83414
Lastra a Signa FI 9 20156 103570
Signa FI 10 19179 122749
Castelfiorentino FI 12 17504 140253
Carmignano PO 12 14450 154703
Vinci FI 13 14604 169307
Poggio a Caiano PO 13 10007 179314
Scandicci FI 13 50609 229923
San Casciano in Val di Pesa FI 13 17062 246985
Cerreto Guidi FI 14 10870 257855
San Miniato PI 15 27934 285789
Campi Bisenzio FI 16 46166 331955
Quarrata PT 16 26190 358145
Lamporecchio PT 17 7508 365653
Certaldo FI 18 16121 381774
Impruneta FI 18 14615 396389
Fucecchio FI 18 23618 420007
Larciano PT 18 6394 426401
Firenze FI 19 382808 809209
Sesto Fiorentino FI 20 48958 858167
Gambassi Terme FI 20 4870 863037
Montaione FI 20 3700 866737
Tavarnelle Val di Pesa FI 20 7800 874537

Municipalities with at least 50000 inhabitants

An earthquake occurred to
13 Km W of Scandicci (50609 inhabitants)
19 Km W of Firenze (382808 inhabitants)
20 Km S of Prato (191150 inhabitants)
27 Km SE of Pistoia (90315 inhabitants)
45 Km E of Lucca (89046 inhabitants)
49 Km NW of Siena (53903 inhabitants)
51 Km E of Pisa (89158 inhabitants)
61 Km E of Livorno (159219 inhabitants)
65 Km E of Viareggio (62467 inhabitants)
74 Km W of Arezzo (99543 inhabitants)
80 Km E of Massa (69479 inhabitants)
86 Km E of Carrara (63133 inhabitants)
90 Km SW of Imola (69797 inhabitants)
91 Km S of Bologna (386663 inhabitants)
94 Km SW of Faenza (58541 inhabitants)
99 Km SW of Forlì (117913 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
Reviewed
Rev100 		ML 0.8 2020-01-18
18:21:29		 43.7057 11.0325 11 2020-01-18
18:30:51		 Sala Sismica INGV-Roma 75634091
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-01-18 18:21:29 ± 0.07
Latitude 43.7057 ± 0.0045
Longitude 11.0325 ± 0.0075
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 75634091

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 592
Semi-minor axis of confidence ellipse (meter) 309
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 241
Circular confidence region, given by single value of horizontal uncertainty (meter) 590.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 84
Number of associated phases, regardless of their use for origin computation 19
Number of defining phases 17
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.23
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.59805
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 10
Magnitude information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 75634091
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-01-18 18:30:51
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ARVD.HHZ. 2020-01-18T18:22:15.04 3.0 undecidable manual S -0.09 0
IV.NDIM.HHZ. 2020-01-18T18:22:09.92 3.0 undecidable manual S -0.01 0
IV.RONT.HHZ. 2020-01-18T18:21:43.46 0.3 undecidable manual S 45 45.2214 50 -0.23 68
IV.RUFI.EHZ. 2020-01-18T18:21:42.41 0.3 undecidable manual S 69 40.9257 50 -0.14 70
IV.TRIF.CHN. 2020-01-18T18:21:41.01 0.3 undecidable manual P 189 66.378 50 0.2 67
IV.PII.HHZ. 2020-01-18T18:21:41.81 0.3 undecidable manual S 273 40.7259 50 -0.68 62
IV.CSNT.HHZ. 2020-01-18T18:21:40.11 0.3 undecidable manual S 141 33.0447 50 -0.34 67
IV.FROS.CHE. 2020-01-18T18:21:39.55 0.3 undecidable manual P 170 55.8996 50 0.36 66
IV.MPPT.EHZ. 2020-01-18T18:21:39.17 0.3 undecidable manual S 9 28.3494 50 0 74
IV.BDI.HHZ. 2020-01-18T18:21:38.89 0.1 undecidable manual P 319 52.8027 50 0.18 91
IV.OSSC.HHZ. 2020-01-18T18:21:38.56 0.1 undecidable manual S 140 26.4513 50 -0.12 95
IV.RUFI.EHZ. 2020-01-18T18:21:37.07 0.3 undecidable manual P 69 40.9257 50 0.19 70
IV.RONT.HHZ. 2020-01-18T18:21:37.71 0.1 undecidable manual P 45 45.2214 50 0.17 93
IV.PII.HHZ. 2020-01-18T18:21:37.02 0.3 undecidable manual P 273 40.7259 50 0.17 70
IV.MPPT.EHZ. 2020-01-18T18:21:35.02 0.1 undecidable manual P 9 28.3494 50 0.09 97
IV.CSNT.HHZ. 2020-01-18T18:21:35.71 0.3 undecidable manual P 141 33.0447 50 0.04 73
IV.OSSC.HHZ. 2020-01-18T18:21:34.66 0.3 undecidable manual P 140 26.4513 50 0 73
IV.CRMI.HHZ. 2020-01-18T18:21:34.18 0.3 undecidable manual S 337 10.878 136 -0.34 71
IV.CRMI.HHZ. 2020-01-18T18:21:32.35 0.1 undecidable manual P 337 10.878 136 0.1 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.OSSC.HHE. ML:0.8 0.000037433665000000005 0.4736 AML other m 2020-01-18T18:21:38.94
IV.OSSC.HHN. ML:0.7 0.0000284090655 0.2432 AML other m 2020-01-18T18:21:38.74
IV.OSSC.HNE. ML:1.0 0.000049817340000000004 0.4352 AML other m 2020-01-18T18:21:38.85
IV.OSSC.HNN. ML:1.0 0.000049115950000000005 0.2688 AML other m 2020-01-18T18:21:38.66
IV.MPPT.EHE. ML:0.6 0.000019855445 0.4992 AML other m 2020-01-18T18:21:39.27
IV.MPPT.EHN. ML:0.6 0.000017796209999999998 0.3584 AML other m 2020-01-18T18:21:39.39
IV.CSNT.HHE. ML:0.6 0.000012953822324999999 0.3456 AML other m 2020-01-18T18:21:40.37
IV.CSNT.HHN. ML:0.6 0.00001481742 0.2688 AML other m 2020-01-18T18:21:40.32
IV.PII.HHE. ML:0.8 0.000020231019999999998 0.1408 AML other m 2020-01-18T18:21:42.06
IV.PII.HHN. ML:1.2 0.000054600639999999996 0.1408 AML other m 2020-01-18T18:21:42.03
IV.RUFI.EHN. ML:0.9 0.000025186573 0.2048 AML other m 2020-01-18T18:21:43.05
IV.RONT.HHE. ML:1.3 0.000059614689999999996 0.2176 AML other m 2020-01-18T18:21:45.91
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