Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 17-10-2020 and time 18:51:13 (UTC) in region 2 km NE Premilcuore (FC)

A magnitude ML 1.4 earthquake occured in region: 2 km NE Premilcuore (FC), on

  • 17-10-2020 18:51:13 (UTC)
  • 17-10-2020 20:51:13 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.9920, 11.7860 at 10 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
Premilcuore FC 2 799 799
Portico e San Benedetto FC 4 756 1555
Rocca San Casciano FC 9 1910 3465
Galeata FC 10 2516 5981
Tredozio FC 10 1212 7193
Santa Sofia FC 11 4136 11329
Civitella di Romagna FC 12 3786 15115
San Godenzo FI 15 1167 16282
Dovadola FC 17 1653 17935
Marradi FI 17 3139 21074
Modigliana FC 18 4560 25634
Predappio FC 20 6346 31980

Municipalities with at least 50000 inhabitants

An earthquake occurred to
33 Km SW of Forlì (117913 inhabitants)
34 Km S of Faenza (58541 inhabitants)
40 Km W of Cesena (96758 inhabitants)
41 Km S of Imola (69797 inhabitants)
49 Km NE of Firenze (382808 inhabitants)
55 Km E of Scandicci (50609 inhabitants)
56 Km E of Prato (191150 inhabitants)
58 Km SW of Ravenna (159116 inhabitants)
59 Km N of Arezzo (99543 inhabitants)
63 Km W of Rimini (147750 inhabitants)
66 Km SE of Bologna (386663 inhabitants)
70 Km E of Pistoia (90315 inhabitants)
83 Km NE of Siena (53903 inhabitants)
91 Km W of Pesaro (94582 inhabitants)
95 Km S 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
Reviewed
Rev100 		ML 1.4 2020-10-17
18:51:13		 43.9917 11.7857 10 2020-10-17
18:55:57		 Sala Sismica INGV-Roma 83855261
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-10-17 18:51:13 ± 0.06
Latitude 43.9917 ± 0.0054
Longitude 11.7857 ± 0.0075
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 83855261

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 684
Semi-minor axis of confidence ellipse (meter) 393
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 137
Circular confidence region, given by single value of horizontal uncertainty (meter) 680.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 139
Number of associated phases, regardless of their use for origin computation 22
Number of defining phases 19
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.16
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.43527
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 10
Magnitude information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 83855261
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-10-17 18:55:57
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MF5.EHZ. 2020-10-17T18:52:03.70 3.0 undecidable manual Sn 0.12 0
IV.PESA.HHZ. 2020-10-17T18:51:43.12 3.0 undecidable manual S 1.49 0
IV.COR1.EHZ. 2020-10-17T18:51:31.93 3.0 negative manual P -1.02 0
IV.MOCL.EHZ. 2020-10-17T18:51:29.81 0.6 undecidable manual S 272 48.3183 50 0.31 44
IV.VISG.HHZ. 2020-10-17T18:51:26.08 0.6 undecidable manual S 308 35.5422 50 -0.02 48
IV.SEI.HHZ. 2020-10-17T18:51:25.96 0.6 undecidable manual S 282 34.743 50 0.07 47
IV.RUFI.EHZ. 2020-10-17T18:51:24.19 0.6 undecidable manual S 232 27.8499 50 0.13 46
IV.RONT.HHZ. 2020-10-17T18:51:24.19 0.6 undecidable manual S 271 28.1496 50 0.06 48
IV.MOCL.EHZ. 2020-10-17T18:51:23.05 0.1 undecidable manual P 272 48.3183 50 0.16 90
IV.BRIS.HHZ. 2020-10-17T18:51:23.89 0.3 undecidable manual S 357 25.8519 111 0.45 66
IV.ASQU.HHZ. 2020-10-17T18:51:22.29 0.6 undecidable manual S 179 21.6672 114 0.21 47
IV.RINC.HHZ. 2020-10-17T18:51:21.19 0.6 undecidable manual S 231 18.4704 118 0.1 49
IT.FAZ.HNZ. 2020-10-17T18:51:20.74 0.1 undecidable manual P 14 35.0427 50 -0.1 96
IV.SEI.HHZ. 2020-10-17T18:51:20.55 0.1 undecidable manual P 282 34.743 50 -0.26 92
IV.VISG.HHZ. 2020-10-17T18:51:20.71 0.1 undecidable manual P 308 35.5422 50 -0.21 92
IV.BRIS.HHZ. 2020-10-17T18:51:19.46 0.1 undecidable manual P 357 25.8519 111 0.07 96
IV.RONT.HHZ. 2020-10-17T18:51:19.70 0.1 undecidable manual P 271 28.1496 50 -0.08 96
IV.RUFI.EHZ. 2020-10-17T18:51:19.50 0.1 undecidable manual P 232 27.8499 50 -0.24 94
IV.ASQU.HHZ. 2020-10-17T18:51:18.61 0.1 undecidable manual P 179 21.6672 114 0.01 98
IV.SFI.EHZ. 2020-10-17T18:51:18.91 0.6 undecidable manual S 153 10.7781 132 0.01 50
IV.RINC.HHZ. 2020-10-17T18:51:17.97 0.1 undecidable manual P 231 18.4704 118 -0.06 96
IV.SFI.EHZ. 2020-10-17T18:51:16.78 0.1 undecidable manual P 153 10.7781 132 0.02 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SFI.EHE. ML:1.2 0.00020050000000000002 1.9 AML other m 2020-10-17T18:51:19.98
IV.SFI.EHN. ML:1.3 0.000262 0.44 AML other m 2020-10-17T18:51:19.08
IV.ASQU.HHE. ML:1.2 0.00011995 0.22 AML other m 2020-10-17T18:51:22.48
IV.RINC.HHE. ML:0.9 0.00007005 1.3 AML other m 2020-10-17T18:51:22.26
IV.ASQU.HHN. ML:1.1 0.00008175000000000001 0.16 AML other m 2020-10-17T18:51:23.10
IV.BRIS.HHE. ML:1.6 0.00022449999999999998 0.36 AML other m 2020-10-17T18:51:24.36
IV.RINC.HHN. ML:0.9 0.0000719 0.38 AML other m 2020-10-17T18:51:24.53
IV.RONT.HHE. ML:1.7 0.00026900000000000003 1.18 AML other m 2020-10-17T18:51:25.66
IV.BRIS.HHN. ML:1.5 0.0001815 0.78 AML other m 2020-10-17T18:51:25.48
IV.RONT.HHN. ML:1.7 0.000259 0.14 AML other m 2020-10-17T18:51:25.24
IV.SEI.HHN. ML:1.6 0.000148 0.78 AML other m 2020-10-17T18:51:28.61
IV.SEI.HHE. ML:1.4 0.0001116 0.94 AML other m 2020-10-17T18:51:28.00
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