Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 24-01-2021 and time 21:38:08 (Italy) in region 4 km S Vernio (PO)

A magnitude ML 1.1 earthquake occured in region: 4 km S Vernio (PO), on

  • 24-01-2021 20:38:08 (UTC)
  • 24-01-2021 21:38:08 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.0210, 11.1630 at 9 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
Vernio PO 4 6060 6060
Cantagallo PO 5 3105 9165
Barberino di Mugello FI 7 10836 20001
Vaiano PO 7 9895 29896
Castiglione dei Pepoli BO 14 5648 35544
Scarperia e San Piero FI 14 12217 47761
Montemurlo PO 14 18456 66217
Montale PT 15 10737 76954
Vaglia FI 16 5073 82027
Sambuca Pistoiese PT 16 1626 83653
Prato PO 16 191150 274803
Calenzano FI 17 17489 292292
Camugnano BO 18 1885 294177
Agliana PT 18 17525 311702
Castel di Casio BO 19 3448 315150
Borgo San Lorenzo FI 19 18211 333361

Municipalities with at least 50000 inhabitants

An earthquake occurred to
16 Km NE of Prato (191150 inhabitants)
22 Km E of Pistoia (90315 inhabitants)
29 Km N of Firenze (382808 inhabitants)
29 Km N of Scandicci (50609 inhabitants)
55 Km S of Bologna (386663 inhabitants)
56 Km E of Lucca (89046 inhabitants)
58 Km SW of Imola (69797 inhabitants)
65 Km W of Faenza (58541 inhabitants)
70 Km E of Pisa (89158 inhabitants)
72 Km S of Modena (184973 inhabitants)
74 Km W of Forlì (117913 inhabitants)
75 Km E of Viareggio (62467 inhabitants)
79 Km N of Siena (53903 inhabitants)
82 Km E of Massa (69479 inhabitants)
84 Km NW of Arezzo (99543 inhabitants)
85 Km E of Carrara (63133 inhabitants)
86 Km NE of Livorno (159219 inhabitants)
86 Km SE of Reggio nell'Emilia (171345 inhabitants)
87 Km W of Cesena (96758 inhabitants)
88 Km S of Carpi (70699 inhabitants)
94 Km W of Ravenna (159116 inhabitants)
98 Km SW of Ferrara (133155 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 1.1 2021-01-24
20:38:08		 44.0207 11.1632 9 2021-07-12
16:55:16		 Bollettino Sismico Italiano INGV 91998651
Reviewed
Rev100 		ML 1.2 2021-01-24
20:38:09		 44.0252 11.1695 6 2021-01-24
20:46:13		 Sala Sismica INGV-Roma 86543921
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-24 20:38:08 ± 0.1
Latitude 44.0207 ± 0.0054
Longitude 11.1632 ± 0.0063
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 91998651

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 628
Semi-minor axis of confidence ellipse (meter) 197
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 3
Circular confidence region, given by single value of horizontal uncertainty (meter) 630.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 87
Number of associated phases, regardless of their use for origin computation 23
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.27
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.41009
Number of stations at which the event was observed 15
Number of stations from which data was used for origin computation 7
Magnitudes information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.4
Num. used stations 6
Type of magnitude ML
Reference to an origin 91998651
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-06-28 11:16:03

ML:1.2

Field Value
Value 1.2
Uncertainty 0.2
Num. used stations 4
Type of magnitude ML
Reference to an origin 86543921
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-01-24 20:46:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CELI.HHZ. 2021-01-24T20:40:00.45 3.0 undecidable manual Pg 20.360001 0
IV.VIVA.HHZ. 2021-01-24T20:39:29.37 3.0 undecidable manual Sg 1.88 0
IV.MCEL.HHZ. 2021-01-24T20:39:27.64 3.0 positive manual Pn 2.06 0
OT.OT05.EHZ. 2021-01-24T20:39:20.08 3.0 positive manual Pg 8.68 0
IV.MTRA.EHZ. 2021-01-24T20:39:13.72 3.0 undecidable manual Sn -1.61 0
IV.ZONE.HHZ. 2021-01-24T20:38:56.58 3.0 undecidable manual Sn -1.61 0
IV.VIVA.HHZ. 2021-01-24T20:38:51.14 3.0 positive manual Pn -0.11 0
IV.FIU.EHZ. 2021-01-24T20:38:29.52 3.0 undecidable manual S 1.8 0
IV.BDI.HNZ. 2021-01-24T20:38:23.43 0.6 undecidable manual S 276 45.5211 50 -0.12 45
IV.RUFI.EHZ. 2021-01-24T20:38:20.07 0.6 undecidable manual S 126 34.3434 50 -0.49 43
IV.NDIM.HNZ. 2021-01-24T20:38:20.17 3.0 positive manual P 1.06 0
IV.BDI.HNZ. 2021-01-24T20:38:17.00 0.3 undecidable manual P 276 45.5211 50 -0.19 67
IV.RONT.HHZ. 2021-01-24T20:38:17.15 0.3 undecidable manual S 98 21.7671 113 0.45 66
IV.RUFI.EHZ. 2021-01-24T20:38:15.53 0.3 undecidable manual P 126 34.3434 50 0.06 70
IV.FNVD.HHZ. 2021-01-24T20:38:15.06 0.1 undecidable manual S 349 16.6722 119 -0.04 97
IV.SEI.HHZ. 2021-01-24T20:38:14.61 0.1 undecidable manual S 76 16.0728 120 -0.31 92
IV.MPPT.EHN. 2021-01-24T20:38:13.08 0.1 undecidable manual S 220 9.0798 135 0.08 98
IV.RONT.HHZ. 2021-01-24T20:38:13.56 0.1 undecidable manual P 98 21.7671 113 0.32 91
IV.FNVD.HHZ. 2021-01-24T20:38:12.55 0.1 undecidable manual P 349 16.6722 119 0.23 94
IV.SEI.HHZ. 2021-01-24T20:38:12.21 0.1 undecidable manual P 76 16.0728 120 0 98
IV.MPPT.EHN. 2021-01-24T20:38:11.32 0.1 undecidable manual P 220 9.0798 135 0.22 95
IV.MOCL.EHZ. 2021-01-24T20:38:11.31 0.1 undecidable manual S 141 2.2977 166 -0.47 91
IV.MOCL.EHZ. 2021-01-24T20:38:10.38 0.1 undecidable manual P 141 2.2977 166 -0.02 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SEI.HHE. ML:1.0 0.00009635 0.36 AML other m 2021-01-24T20:38:15.66
IV.SEI.HHN. ML:1.3 0.0001715 0.2 AML other m 2021-01-24T20:38:15.53
IV.RONT.HHE. ML:1.3 0.000141977205 0.1664 AML other m 2021-01-24T20:38:18.41
IV.RONT.HHN. ML:1.4 0.00017530319999999999 0.1792 AML other m 2021-01-24T20:38:18.93
IV.RUFI.EHN. ML:0.6 0.000016809365 0.384 AML other m 2021-01-24T20:38:20.52
IV.RUFI.EHE. ML:0.4 0.0000113729655 0 AML other m 2021-01-24T20:38:20.90
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