Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 18-11-2020 and time 22:44:03 (UTC) in region 1 km E Premilcuore (FC)

A magnitude ML 1.2 earthquake occured in region: 1 km E Premilcuore (FC), on

  • 18-11-2020 22:44:03 (UTC)
  • 18-11-2020 23:44:03 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.9800, 11.7840 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 1 799 799
Portico e San Benedetto FC 5 756 1555
Rocca San Casciano FC 10 1910 3465
Galeata FC 10 2516 5981
Santa Sofia FC 11 4136 10117
Tredozio FC 12 1212 11329
Civitella di Romagna FC 13 3786 15115
San Godenzo FI 14 1167 16282
Marradi FI 17 3139 19421
Dovadola FC 18 1653 21074
Modigliana FC 20 4560 25634

Municipalities with at least 50000 inhabitants

An earthquake occurred to
34 Km SW of Forlì (117913 inhabitants)
35 Km S of Faenza (58541 inhabitants)
41 Km W of Cesena (96758 inhabitants)
42 Km S of Imola (69797 inhabitants)
48 Km E of Firenze (382808 inhabitants)
54 Km E of Scandicci (50609 inhabitants)
56 Km E of Prato (191150 inhabitants)
58 Km N of Arezzo (99543 inhabitants)
59 Km SW of Ravenna (159116 inhabitants)
63 Km W of Rimini (147750 inhabitants)
67 Km SE of Bologna (386663 inhabitants)
70 Km E of Pistoia (90315 inhabitants)
82 Km NE of Siena (53903 inhabitants)
91 Km W of Pesaro (94582 inhabitants)
96 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 1.2 2020-11-18
22:44:03		 43.9795 11.7842 10 2020-11-18
22:57:33		 Sala Sismica INGV-Roma 84834041
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-11-18 22:44:03 ± 0.08
Latitude 43.9795 ± 0.0027
Longitude 11.7842 ± 0.0062
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 84834041

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 489
Semi-minor axis of confidence ellipse (meter) 210
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 87
Circular confidence region, given by single value of horizontal uncertainty (meter) 490.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 164
Number of associated phases, regardless of their use for origin computation 14
Number of defining phases 14
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) 0.15738
Epicentral distance of station farthest from the epicenter (degree) 0.38041
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 84834041
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-11-18 22:57:33
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CRE.HHZ. 2020-11-18T22:44:17.40 0.6 undecidable manual S 161 42.2244 50 0.31 46
IV.SEI.HHZ. 2020-11-18T22:44:15.31 0.6 undecidable manual S 284 34.9428 50 0.16 48
IV.RONT.HHZ. 2020-11-18T22:44:13.47 0.6 undecidable manual S 273 28.0497 50 0.15 49
IV.BRIS.HHZ. 2020-11-18T22:44:13.44 0.6 undecidable manual S 357 27.2505 110 0.35 47
IV.RUFI.EHZ. 2020-11-18T22:44:12.97 0.6 undecidable manual S 235 26.9508 110 -0.05 50
IV.CRE.HHZ. 2020-11-18T22:44:11.02 0.6 undecidable manual P 161 42.2244 50 -0.14 48
IV.RINC.HHZ. 2020-11-18T22:44:10.32 0.6 undecidable manual S 234 17.4714 119 0.31 48
IV.ASQU.HHZ. 2020-11-18T22:44:10.95 0.3 undecidable manual S 179 20.2686 116 0.09 75
IV.SEI.HHZ. 2020-11-18T22:44:09.89 0.3 negative manual P 284 34.9428 50 -0.15 72
IV.BRIS.HHZ. 2020-11-18T22:44:08.76 0.1 negative manual P 357 27.2505 110 -0.09 98
IV.RONT.HHZ. 2020-11-18T22:44:08.87 0.1 positive manual P 273 28.0497 50 -0.12 98
IV.RUFI.EHZ. 2020-11-18T22:44:08.56 0.3 undecidable manual P 235 26.9508 110 -0.25 72
IV.RINC.HHZ. 2020-11-18T22:44:07.09 1.0 negative manual P 234 17.4714 119 0.02 25
IV.ASQU.HHZ. 2020-11-18T22:44:07.49 0.1 positive manual P 179 20.2686 116 -0.08 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ASQU.HHE. ML:1.0 0.00007324999999999999 0.22 AML other m 2020-11-18T22:44:11.26
IV.ASQU.HHN. ML:1.0 0.0000665 0.42 AML other m 2020-11-18T22:44:11.38
IV.RONT.HHN. ML:1.4 0.00011750000000000001 0.64 AML other m 2020-11-18T22:44:14.84
IV.RONT.HHE. ML:1.4 0.0001225 0.3 AML other m 2020-11-18T22:44:15.40
IV.SEI.HHE. ML:1.3 0.00007865 0.3 AML other m 2020-11-18T22:44:15.74
IV.SEI.HHN. ML:1.4 0.00010765 1.82 AML other m 2020-11-18T22:44:15.07
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