Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.9 on date 24-12-2019 and time 14:56:38 (UTC) in region 5 km W Tredozio (FC)

A magnitude ML 1.9 earthquake occured in region: 5 km W Tredozio (FC), on

  • 24-12-2019 14:56:38 (UTC)
  • 24-12-2019 15:56:38 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.0830, 11.6850 at 7 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
Tredozio FC 5 1212 1212
Marradi FI 6 3139 4351
Portico e San Benedetto FC 10 756 5107
Palazzuolo sul Senio FI 12 1154 6261
Modigliana FC 12 4560 10821
Rocca San Casciano FC 13 1910 12731
Premilcuore FC 14 799 13530
Casola Valsenio RA 17 2617 16147
Dovadola FC 17 1653 17800
Brisighella RA 17 7639 25439
San Godenzo FI 18 1167 26606

Municipalities with at least 50000 inhabitants

An earthquake occurred to
28 Km SW of Faenza (58541 inhabitants)
30 Km S of Imola (69797 inhabitants)
33 Km W of Forlì (117913 inhabitants)
45 Km W of Cesena (96758 inhabitants)
49 Km NE of Firenze (382808 inhabitants)
52 Km E of Prato (191150 inhabitants)
53 Km SE of Bologna (386663 inhabitants)
54 Km NE of Scandicci (50609 inhabitants)
55 Km SW of Ravenna (159116 inhabitants)
64 Km E of Pistoia (90315 inhabitants)
70 Km N of Arezzo (99543 inhabitants)
70 Km W of Rimini (147750 inhabitants)
84 Km S of Ferrara (133155 inhabitants)
87 Km SE of Modena (184973 inhabitants)
90 Km NE of Siena (53903 inhabitants)
98 Km E of Lucca (89046 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 1.9 2019-12-24
14:56:38		 44.0827 11.6853 7 2020-02-28
16:42:21		 Bollettino Sismico Italiano INGV 76027791
Reviewed
Rev100 		ML 2.0 2019-12-24
14:56:38		 44.0792 11.6823 6 2020-02-03
13:14:45		 Sala Sismica INGV-Roma 74942621
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-12-24 14:56:38 ± 0.1
Latitude 44.0827 ± 0.0036
Longitude 11.6853 ± 0.0063
Depth (km) 7 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 76027791

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 502
Semi-minor axis of confidence ellipse (meter) 167
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 246
Circular confidence region, given by single value of horizontal uncertainty (meter) 500.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 86
Number of associated phases, regardless of their use for origin computation 23
Number of defining phases 23
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.28
Epicentral distance of station closest to the epicenter (degree) 0.01619
Epicentral distance of station farthest from the epicenter (degree) 0.50182
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 13
Magnitudes information

ML:1.9

Field Value
Value 1.9
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 76027791
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-02-03 13:14:22

ML:2.0

Field Value
Value 2.0
Uncertainty 0.3
Num. used stations 16
Type of magnitude ML
Reference to an origin 74942621
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-12-24 15:05:55
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CRE.HHE. 2019-12-24T14:56:56.78 0.3 undecidable manual S 157 55.6998 50 0.32 67
IV.RUFI.EHZ. 2019-12-24T14:56:49.03 0.3 undecidable manual S 207 30.5472 103 -0.07 73
IV.ASQU.HHE. 2019-12-24T14:56:49.86 0.3 undecidable manual S 165 32.745 102 0 74
IV.CRE.HHE. 2019-12-24T14:56:48.33 0.1 undecidable manual P 157 55.6998 50 -0.43 87
IV.MPPT.EHZ. 2019-12-24T14:56:47.31 0.3 undecidable manual P 254 49.4172 50 -0.49 65
IV.SFI.HNN. 2019-12-24T14:56:47.12 0.3 undecidable manual S 147 23.5542 107 0.36 70
IV.SEI.HHZ. 2019-12-24T14:56:47.78 0.6 undecidable manual S 263 26.2515 105 0.13 49
IV.VISG.HHZ. 2019-12-24T14:56:46.62 0.3 undecidable manual S 301 23.2545 107 -0.02 75
IV.RONT.HHZ. 2019-12-24T14:56:46.84 0.3 undecidable manual S 244 22.4553 107 0.46 69
IV.RINC.HHZ. 2019-12-24T14:56:46.89 0.3 undecidable manual S 196 22.6551 107 0.44 69
IV.MTRZ.HNN. 2019-12-24T14:56:45.26 0.6 undecidable manual P 321 32.8449 102 0.29 47
IV.IMOL.EHZ. 2019-12-24T14:56:45.38 1.0 undecidable manual P 8 31.0467 103 0.77 20
IV.BRIS.HHZ. 2019-12-24T14:56:45.19 0.6 undecidable manual S 22 17.0718 112 0.58 44
IV.ASQU.HHE. 2019-12-24T14:56:44.71 0.1 positive manual P 165 32.745 102 -0.23 94
IV.RUFI.EHZ. 2019-12-24T14:56:44.32 0.1 positive manual P 207 30.5472 103 -0.19 96
IV.RINC.HHZ. 2019-12-24T14:56:43.11 0.1 positive manual P 196 22.6551 107 0.13 98
IV.SFI.HNN. 2019-12-24T14:56:43.18 0.1 positive manual P 147 23.5542 107 0.03 100
IV.SEI.HHZ. 2019-12-24T14:56:43.43 0.1 negative manual P 263 26.2515 105 -0.24 95
IV.RONT.HHZ. 2019-12-24T14:56:43.11 0.1 positive manual P 244 22.4553 107 0.17 97
IV.BRIS.HHZ. 2019-12-24T14:56:42.09 0.1 undecidable manual P 22 17.0718 112 0.17 98
IV.VISG.HHZ. 2019-12-24T14:56:42.89 0.1 negative manual P 301 23.2545 107 -0.2 97
IV.LMD.HHZ. 2019-12-24T14:56:40.24 0.3 undecidable manual S 108 1.7982 165 -0.5 70
IV.LMD.HHZ. 2019-12-24T14:56:39.43 0.1 positive manual P 108 1.7982 165 -0.25 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.BRIS.HHE. ML:2.0 0.0010802715 0.0896 AML other m 2019-12-24T14:56:45.66
IV.BRIS.HHN. ML:2.1 0.0012053615 0.32 AML other m 2019-12-24T14:56:46.27
IV.VISG.HHE. ML:1.9 0.0004897337499999999 0.128 AML other m 2019-12-24T14:56:46.73
IV.VISG.HHN. ML:1.9 0.00057112495 0.1152 AML other m 2019-12-24T14:56:47.04
IV.RINC.HHN. ML:1.6 0.0002549125 0.2176 AML other m 2019-12-24T14:56:47.27
IV.RONT.HHE. ML:2.4 0.0017260754999999998 0.32 AML other m 2019-12-24T14:56:47.30
IV.RONT.HHN. ML:2.3 0.0013904299999999998 0.4096 AML other m 2019-12-24T14:56:47.68
IV.RINC.HHE. ML:1.7 0.00033241125 0.2816 AML other m 2019-12-24T14:56:48.65
IV.RUFI.EHN. ML:1.7 0.00023315650000000002 0.256 AML other m 2019-12-24T14:56:49.44
IV.RUFI.EHE. ML:1.5 0.00014037125 0.4864 AML other m 2019-12-24T14:56:49.61
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
Waveforms Seismic signals in miniseed + resp format Download