Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 06-02-2021 and time 13:20:48 (UTC) in region 3 km SE Civitella di Romagna (FC)

A magnitude ML 1.5 earthquake occured in region: 3 km SE Civitella di Romagna (FC), on

  • 06-02-2021 13:20:48 (UTC)
  • 06-02-2021 14:20:48 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.9920, 11.9650 at 30 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
Civitella di Romagna FC 3 3786 3786
Galeata FC 4 2516 6302
Santa Sofia FC 7 4136 10438
Predappio FC 12 6346 16784
Rocca San Casciano FC 13 1910 18694
Bagno di Romagna FC 15 6026 24720
Portico e San Benedetto FC 15 756 25476
Premilcuore FC 15 799 26275
Dovadola FC 16 1653 27928
Sarsina FC 16 3446 31374
Meldola FC 17 9970 41344
Mercato Saraceno FC 19 6886 48230

Municipalities with at least 50000 inhabitants

An earthquake occurred to
26 Km S of Forlì (117913 inhabitants)
28 Km SW of Cesena (96758 inhabitants)
33 Km S of Faenza (58541 inhabitants)
45 Km SE of Imola (69797 inhabitants)
49 Km W of Rimini (147750 inhabitants)
51 Km SW of Ravenna (159116 inhabitants)
59 Km N of Arezzo (99543 inhabitants)
62 Km E of Firenze (382808 inhabitants)
68 Km E of Scandicci (50609 inhabitants)
71 Km E of Prato (191150 inhabitants)
75 Km SE of Bologna (386663 inhabitants)
77 Km W of Pesaro (94582 inhabitants)
84 Km E of Pistoia (90315 inhabitants)
86 Km W of Fano (60888 inhabitants)
91 Km NE of Siena (53903 inhabitants)
98 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
Bulletin
Rev1000 		ML 1.5 2021-02-06
13:20:48		 43.9923 11.9647 30 2021-07-12
16:55:10		 Bollettino Sismico Italiano INGV 89804011
Reviewed
Rev100 		ML 1.5 2021-02-06
13:20:49		 43.9977 11.9352 26 2021-02-06
13:30:41		 Sala Sismica INGV-Roma 86883641
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-02-06 13:20:48 ± 0.14
Latitude 43.9923 ± 0.0063
Longitude 11.9647 ± 0.0075
Depth (km) 30 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 89804011

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 693
Semi-minor axis of confidence ellipse (meter) 136
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 214
Circular confidence region, given by single value of horizontal uncertainty (meter) 690.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 130
Number of associated phases, regardless of their use for origin computation 27
Number of defining phases 19
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.15
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.43977
Number of stations at which the event was observed 18
Number of stations from which data was used for origin computation 10
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 16
Type of magnitude ML
Reference to an origin 89804011
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-05-05 16:15:00

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 14
Type of magnitude ML
Reference to an origin 86883641
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-02-06 13:30:41
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.PTRJ.HNZ. 2021-02-06T13:22:27.53 3.0 undecidable manual Sg 7.44 0
IV.VARE.HHZ. 2021-02-06T13:22:27.46 3.0 undecidable manual Sg 15.36 0
IV.ERC.EHZ. 2021-02-06T13:22:19.93 3.0 undecidable manual Pn 1.85 0
IV.FVI.HHZ. 2021-02-06T13:22:00.28 3.0 undecidable manual Sn -5.43 0
IV.VIVA.HHZ. 2021-02-06T13:21:58.53 3.0 undecidable manual Sg 0.99 0
OT.OT14.EHZ. 2021-02-06T13:21:52.14 3.0 undecidable manual Pg 6.77 0
IV.RIBO.EHZ.01 2021-02-06T13:21:29.83 3.0 undecidable manual Sg -0.97 0
IV.MMO1.EHZ. 2021-02-06T13:21:17.77 3.0 negative manual Pg 1.21 0
IV.SEI.HHZ. 2021-02-06T13:21:05.38 1.0 undecidable manual S 278 48.8178 116 0 24
IV.CRE.HHZ. 2021-02-06T13:21:04.00 0.6 undecidable manual S 181 41.4252 121 0.36 46
IV.PARC.HHZ. 2021-02-06T13:21:04.13 1.0 undecidable manual S 150 44.0226 119 -0.1 24
IV.RUFI.EHZ. 2021-02-06T13:21:03.36 0.6 undecidable manual S 245 40.2264 122 0 49
IV.BRIS.HHZ. 2021-02-06T13:21:01.62 1.0 undecidable manual S 329 30.2475 130 0.42 23
IV.RINC.HHZ. 2021-02-06T13:21:01.39 0.6 undecidable manual S 248 30.8469 130 0.05 50
IV.ASQU.HHZ. 2021-02-06T13:21:00.43 0.6 undecidable manual S 213 25.8519 135 0.09 50
IV.LMD.HHZ. 2021-02-06T13:20:59.48 0.6 undecidable manual S 295 22.5552 139 -0.28 48
IV.SFI.EHZ. 2021-02-06T13:20:58.51 0.6 undecidable manual S 224 13.4754 153 0.1 51
IV.SEI.HHZ. 2021-02-06T13:20:58.50 0.3 undecidable manual P 278 48.8178 116 0.19 70
IV.PARC.HHZ. 2021-02-06T13:20:57.61 1.0 undecidable manual P 150 44.0226 119 -0.04 24
IV.RUFI.EHZ. 2021-02-06T13:20:57.10 0.3 undecidable manual P 245 40.2264 122 -0.05 74
IV.CRE.HHZ. 2021-02-06T13:20:57.21 0.3 undecidable manual P 181 41.4252 121 -0.1 73
IV.BRIS.HHZ. 2021-02-06T13:20:56.25 0.3 undecidable manual P 329 30.2475 130 0.35 70
IV.RSM2.HHZ. 2021-02-06T13:20:56.90 1.0 undecidable manual P 99 38.8278 123 -0.07 24
IV.RINC.HHZ. 2021-02-06T13:20:55.94 0.3 undecidable manual P 248 30.8469 130 -0.04 75
IV.ASQU.HHZ. 2021-02-06T13:20:55.43 0.3 undecidable manual P 213 25.8519 135 0.02 76
IV.SFI.EHZ. 2021-02-06T13:20:54.10 0.1 positive manual P 224 13.4754 153 -0.19 100
IV.LMD.HHZ. 2021-02-06T13:20:54.78 0.3 positive manual P 295 22.5552 139 -0.29 73
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SFI.EHN. ML:1.2 0.00007585 1.18 AML other m 2021-02-06T13:20:59.74
IV.SFI.EHE. ML:1.2 0.00006709999999999999 0.42 AML other m 2021-02-06T13:20:59.48
IV.LMD.HHN. ML:1.6 0.0001395 0.74 AML other m 2021-02-06T13:21:00.66
IV.LMD.HHE. ML:1.5 0.000131 0.18 AML other m 2021-02-06T13:21:00.59
IV.ASQU.HHN. ML:1.6 0.000128 0.78 AML other m 2021-02-06T13:21:01.77
IV.ASQU.HHE. ML:1.7 0.000174 0.36 AML other m 2021-02-06T13:21:01.88
IV.RINC.HHE. ML:1.6 0.00014700000000000002 0.4 AML other m 2021-02-06T13:21:01.95
IV.RINC.HHN. ML:1.6 0.000118 0.84 AML other m 2021-02-06T13:21:02.23
IV.BRIS.HHN. ML:2.2 0.0005355 0.36 AML other m 2021-02-06T13:21:03.22
IV.BRIS.HHE. ML:2.0 0.000354 0.28 AML other m 2021-02-06T13:21:03.43
IV.CRE.HHE. ML:1.4 0.000060049999999999996 0.3 AML other m 2021-02-06T13:21:04.79
IV.CRE.HHN. ML:1.5 0.00008410000000000001 0.36 AML other m 2021-02-06T13:21:05.20
IV.PARC.HHN. ML:1.2 0.00004065 0.44 AML other m 2021-02-06T13:21:05.68
IV.SEI.HHN. ML:1.8 0.00015050000000000003 1.28 AML other m 2021-02-06T13:21:07.82
IV.SEI.HHE. ML:1.6 0.00009120000000000001 0.3 AML other m 2021-02-06T13:21:07.40
IV.PARC.HHE. ML:1.2 0.00003795 0.44 AML other m 2021-02-06T13:21:07.66
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