Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 22-12-2019 and time 16:41:59 (Italy) in region 4 km W Premilcuore (FC)

A magnitude ML 1.8 earthquake occured in region: 4 km W Premilcuore (FC), on

  • 22-12-2019 15:41:59 (UTC)
  • 22-12-2019 16:41:59 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.9800, 11.7240 at 6 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
Premilcuore FC 4 799 799
Portico e San Benedetto FC 7 756 1555
San Godenzo FI 10 1167 2722
Tredozio FC 11 1212 3934
Rocca San Casciano FC 13 1910 5844
Marradi FI 14 3139 8983
Galeata FC 15 2516 11499
Santa Sofia FC 15 4136 15635
Civitella di Romagna FC 18 3786 19421
Londa FI 18 1840 21261
Dicomano FI 19 5515 26776

Municipalities with at least 50000 inhabitants

An earthquake occurred to
36 Km SW of Faenza (58541 inhabitants)
37 Km SW of Forlì (117913 inhabitants)
42 Km S of Imola (69797 inhabitants)
44 Km NE of Firenze (382808 inhabitants)
45 Km W of Cesena (96758 inhabitants)
50 Km E of Scandicci (50609 inhabitants)
51 Km E of Prato (191150 inhabitants)
59 Km N of Arezzo (99543 inhabitants)
62 Km SW of Ravenna (159116 inhabitants)
65 Km E of Pistoia (90315 inhabitants)
65 Km SE of Bologna (386663 inhabitants)
68 Km W of Rimini (147750 inhabitants)
80 Km NE of Siena (53903 inhabitants)
96 Km W of Pesaro (94582 inhabitants)
96 Km S of Ferrara (133155 inhabitants)
98 Km SE of Modena (184973 inhabitants)
99 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 1.8 2019-12-22
15:41:59		 43.9805 11.7238 7 2020-02-28
16:42:21		 Bollettino Sismico Italiano INGV 75986351
Reviewed
Rev100 		ML 2.1 2019-12-22
15:41:59		 43.9898 11.7278 9 2019-12-22
15:48:38		 Sala Sismica INGV-Roma 74900521
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-12-22 15:41:59 ± 0.14
Latitude 43.9805 ± 0.0063
Longitude 11.7238 ± 0.0112
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 75986351

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 854
Semi-minor axis of confidence ellipse (meter) 300
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 75
Circular confidence region, given by single value of horizontal uncertainty (meter) 850.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 123
Number of associated phases, regardless of their use for origin computation 19
Number of defining phases 15
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.46
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.39660
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 8
Magnitudes information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 13
Type of magnitude ML
Reference to an origin 75986351
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-01-29 07:23:16

ML:2.1

Field Value
Value 2.1
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 74900521
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-12-22 15:48:38
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CRE.HHZ. 2019-12-22T15:42:14.30 0.1 undecidable manual S 155 44.0226 50 -0.51 87
IV.IMOL.HNZ. 2019-12-22T15:42:14.43 0.3 undecidable manual S 2 42.0246 50 0.15 71
IV.ASQU.HHZ. 2019-12-22T15:42:11.25 3.0 undecidable manual S 0
IV.ASQU.HHZ. 2019-12-22T15:42:10.00 3.0 undecidable manual P 0
IV.SEI.HHZ. 2019-12-22T15:42:10.20 0.1 undecidable manual S 286 30.2475 102 -0.11 98
IV.BRIS.HHZ. 2019-12-22T15:42:09.63 0.1 undecidable manual S 7 27.2505 103 0.33 94
IV.MTRZ.HNN. 2019-12-22T15:42:09.24 0.3 undecidable manual P 327 43.9227 50 0.89 56
IV.IMOL.HNZ. 2019-12-22T15:42:08.95 0.3 undecidable manual P 2 42.0246 50 0.88 56
IV.RONT.HHZ. 2019-12-22T15:42:08.45 3.0 undecidable manual S 0.39 0
IV.RUFI.EHZ. 2019-12-22T15:42:08.44 0.1 undecidable manual S 227 23.2545 105 0.48 91
IV.CRE.HHZ. 2019-12-22T15:42:07.76 0.1 undecidable manual P 155 44.0226 50 -0.61 84
IV.BRIS.HHZ. 2019-12-22T15:42:05.01 0.1 undecidable manual P 7 27.2505 103 -0.18 97
IV.SEI.HHZ. 2019-12-22T15:42:05.37 0.1 positive manual P 286 30.2475 102 -0.4 92
IV.RONT.HHZ. 2019-12-22T15:42:04.45 3.0 undecidable manual P 0.06 0
IV.RUFI.EHZ. 2019-12-22T15:42:04.49 0.1 positive manual P 227 23.2545 105 0.07 100
IV.SFI.EHZ. 2019-12-22T15:42:04.95 0.1 undecidable manual S 130 12.9759 117 0.36 95
IV.LMD.HHZ. 2019-12-22T15:42:03.42 0.1 undecidable manual S 353 10.878 121 -0.52 92
IV.SFI.EHZ. 2019-12-22T15:42:02.61 0.1 undecidable manual P 130 12.9759 117 0.14 100
IV.LMD.HHZ. 2019-12-22T15:42:01.77 0.1 positive manual P 353 10.878 121 -0.33 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LMD.HHE. ML:2.2 0.0023016079999999997 0.1536 AML other m 2019-12-22T15:42:03.64
IV.LMD.HHN. ML:1.8 0.0009158473999999999 0.1024 AML other m 2019-12-22T15:42:03.52
IV.SFI.EHN. ML:1.2 0.00019649813999999998 0.1152 AML other m 2019-12-22T15:42:05.57
IV.SFI.EHE. ML:1.0 0.00014131976500000003 0.32 AML other m 2019-12-22T15:42:05.52
IV.SFI.HNN. ML:1.2 0.00021306719499999998 1.1904 AML other m 2019-12-22T15:42:05.04
IV.RONT.HHN. ML:2.0 0.00067250295 0.128 AML other m 2019-12-22T15:42:09.15
IV.RONT.HHE. ML:2.2 0.0010159365 0.1024 AML other m 2019-12-22T15:42:09.20
IV.BRIS.HHE. ML:1.8 0.00037389969499999995 0.0896 AML other m 2019-12-22T15:42:09.72
IV.BRIS.HHN. ML:1.8 0.00036986045 0.1024 AML other m 2019-12-22T15:42:09.73
IV.SEI.HHE. ML:1.8 0.00031298055 0.1536 AML other m 2019-12-22T15:42:10.81
IV.SEI.HHN. ML:2.2 0.0007146917000000001 0.2176 AML other m 2019-12-22T15:42:10.92
IV.CRE.HHE. ML:1.6 0.000111053675 0.2432 AML other m 2019-12-22T15:42:14.78
IV.CRE.HHN. ML:1.6 0.0001344883 0.1792 AML other m 2019-12-22T15:42:14.82
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