Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 10-02-2021 and time 19:18:14 (UTC) in region 2 km NW Tredozio (FC)

A magnitude ML 1.6 earthquake occured in region: 2 km NW Tredozio (FC), on

  • 10-02-2021 19:18:14 (UTC)
  • 10-02-2021 20:18:14 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.0930, 11.7240 at 26 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.

Hai sentito il terremoto? Clicca qui

Did you feel it? Fill in the questionnaire.

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 2 1212 1212
Portico e San Benedetto FC 9 756 1968
Marradi FI 9 3139 5107
Modigliana FC 9 4560 9667
Rocca San Casciano FC 10 1910 11577
Premilcuore FC 14 799 12376
Dovadola FC 14 1653 14029
Palazzuolo sul Senio FI 14 1154 15183
Brisighella RA 15 7639 22822
Casola Valsenio RA 17 2617 25439
Galeata FC 18 2516 27955
Civitella di Romagna FC 20 3786 31741

Municipalities with at least 50000 inhabitants

An earthquake occurred to
25 Km SW of Faenza (58541 inhabitants)
29 Km S of Imola (69797 inhabitants)
29 Km W of Forlì (117913 inhabitants)
42 Km W of Cesena (96758 inhabitants)
52 Km NE of Firenze (382808 inhabitants)
52 Km SW of Ravenna (159116 inhabitants)
54 Km SE of Bologna (386663 inhabitants)
55 Km E of Prato (191150 inhabitants)
57 Km NE of Scandicci (50609 inhabitants)
67 Km E of Pistoia (90315 inhabitants)
67 Km W of Rimini (147750 inhabitants)
71 Km N of Arezzo (99543 inhabitants)
83 Km S of Ferrara (133155 inhabitants)
88 Km SE of Modena (184973 inhabitants)
92 Km NE of Siena (53903 inhabitants)
97 Km W of Pesaro (94582 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 1.6 2021-02-10
19:18:14		 44.0928 11.7235 26 2021-07-12
16:55:05		 Bollettino Sismico Italiano INGV 88842151
Reviewed
Rev100 		ML 1.6 2021-02-10
19:18:14		 44.1008 11.742 27 2021-02-10
19:27:53		 Sala Sismica INGV-Roma 87015841
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-02-10 19:18:14 ± 0.4
Latitude 44.0928 ± 0.0099
Longitude 11.7235 ± 0.0200
Depth (km) 26 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 88842151

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1494
Semi-minor axis of confidence ellipse (meter) 670
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 263
Circular confidence region, given by single value of horizontal uncertainty (meter) 1490.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 142
Number of associated phases, regardless of their use for origin computation 19
Number of defining phases 19
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.48
Epicentral distance of station closest to the epicenter (degree) 0.01889
Epicentral distance of station farthest from the epicenter (degree) 0.30667
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 10
Magnitudes information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 20
Type of magnitude ML
Reference to an origin 87015841
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-02-10 19:27:53

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 22
Type of magnitude ML
Reference to an origin 88842151
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-04-06 15:49:41
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MTRZ.HHN. 2021-02-10T19:18:29.10 0.6 undecidable manual S 316 34.0437 121 1.8 23
IV.ASQU.HHZ. 2021-02-10T19:18:27.92 0.3 undecidable manual S 171 33.2445 121 0.8 60
IV.IMOL.EHZ. 2021-02-10T19:18:27.94 0.3 undecidable manual S 3 29.6481 125 1.63 40
IV.RUFI.EHZ. 2021-02-10T19:18:27.37 0.6 undecidable manual S 211 33.0447 122 0.3 46
IV.SEI.HHZ. 2021-02-10T19:18:26.08 0.6 undecidable manual S 262 29.3484 125 -0.18 49
IV.RONT.HHZ. 2021-02-10T19:18:25.89 0.6 undecidable manual S 245 25.6521 130 0.43 46
IV.SFI.EHZ. 2021-02-10T19:18:25.36 0.3 undecidable manual S 155 23.0547 133 0.41 70
IV.BRIS.HHZ. 2021-02-10T19:18:23.50 0.3 undecidable manual S 13 14.9739 146 -0.04 76
IV.MTRZ.HHN. 2021-02-10T19:18:22.04 0.3 undecidable manual P 316 34.0437 121 0.09 73
IV.ASQU.HHZ. 2021-02-10T19:18:22.15 0.1 undecidable manual P 171 33.2445 121 0.3 94
IV.RUFI.EHZ. 2021-02-10T19:18:21.50 0.1 undecidable manual P 211 33.0447 122 -0.31 94
IV.LMD.HHZ. 2021-02-10T19:18:21.97 0.3 undecidable manual S 217 2.0979 175 -0.39 73
IV.SEI.HHZ. 2021-02-10T19:18:21.00 0.1 undecidable manual P 262 29.3484 125 -0.34 94
IV.IMOL.EHZ. 2021-02-10T19:18:21.44 0.1 undecidable manual P 3 29.6481 125 0.06 100
IV.RONT.HHZ. 2021-02-10T19:18:20.78 0.1 undecidable manual P 245 25.6521 130 -0.1 100
IV.SFI.EHZ. 2021-02-10T19:18:20.47 0.1 positive manual P 155 23.0547 133 -0.12 99
IV.RINC.HHZ. 2021-02-10T19:18:20.54 0.1 undecidable manual P 202 24.753 131 -0.24 97
IV.BRIS.HHZ. 2021-02-10T19:18:19.15 0.1 positive manual P 13 14.9739 146 -0.63 87
IV.LMD.HHZ. 2021-02-10T19:18:18.39 0.1 positive manual P 217 2.0979 175 -0.7 87
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LMD.HHN. ML:2.0 0.0006770000000000001 0.16 AML other m 2021-02-10T19:18:22.27
IV.LMD.HHE. ML:1.8 0.00035865954999999997 0.2176 AML other m 2021-02-10T19:18:22.60
IV.RINC.HHN. ML:1.4 0.00006115949000000001 0.4864 AML other m 2021-02-10T19:18:26.37
IV.BRIS.HHE. ML:1.7 0.00025111295 0.1792 AML other m 2021-02-10T19:18:24.74
IV.BRIS.HHN. ML:1.6 0.00019136950000000003 0.2816 AML other m 2021-02-10T19:18:25.06
IV.RUFI.EHN. ML:1.4 0.000006024945 44.7616 AML other m 2021-02-10T19:18:21.52
IV.SFI.HNE. ML:1.6 0.00017553525 0.3584 AML other m 2021-02-10T19:18:26.35
IV.SFI.EHE. ML:1.7 0.000216 0.34 AML other m 2021-02-10T19:18:26.01
IV.SFI.EHN. ML:1.6 0.0001675 0.7 AML other m 2021-02-10T19:18:26.14
IV.SEI.HHE. ML:1.8 0.0002193009 1.7312 AML other m 2021-02-10T19:18:27.88
IV.RINC.HHE. ML:1.4 0.00010767077 0.0608 AML other m 2021-02-10T19:18:28.01
IV.SFI.HNN. ML:1.6 0.00019667519999999998 0.6656 AML other m 2021-02-10T19:18:28.42
IV.ASQU.HHE. ML:1.4 0.000073029495 0.6976 AML other m 2021-02-10T19:18:28.58
IV.RONT.HHN. ML:1.7 0.00018385675000000002 0.3456 AML other m 2021-02-10T19:18:28.62
IV.RONT.HHE. ML:1.8 0.0001889138 0.1792 AML other m 2021-02-10T19:18:26.69
IV.ASQU.HHN. ML:1.3 0.000066259195 0.592 AML other m 2021-02-10T19:18:30.02
IV.SEI.HHN. ML:1.8 0.00022299999999999997 1.62 AML other m 2021-02-10T19:18:31.15
IV.IMOL.HNN. ML:2.2 0.00053572995 0.2688 AML other m 2021-02-10T19:18:28.86
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