Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.3 on date 01-01-2021 and time 11:40:03 (UTC) in region 7 km W Premilcuore (FC)

A magnitude ML 1.3 earthquake occured in region: 7 km W Premilcuore (FC), on

  • 01-01-2021 11:40:03 (UTC)
  • 01-01-2021 12:40:03 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.0060, 11.7020 at 8 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 7 799 799
Portico e San Benedetto FC 7 756 1555
Tredozio FC 9 1212 2767
Marradi FI 11 3139 5906
San Godenzo FI 11 1167 7073
Rocca San Casciano FC 13 1910 8983
Galeata FC 17 2516 11499
Palazzuolo sul Senio FI 17 1154 12653
Santa Sofia FC 18 4136 16789
Modigliana FC 18 4560 21349
Civitella di Romagna FC 19 3786 25135
Dicomano FI 19 5515 30650
Londa FI 19 1840 32490
Dovadola FC 20 1653 34143

Municipalities with at least 50000 inhabitants

An earthquake occurred to
34 Km SW of Faenza (58541 inhabitants)
36 Km SW of Forlì (117913 inhabitants)
39 Km S of Imola (69797 inhabitants)
44 Km NE of Firenze (382808 inhabitants)
46 Km W of Cesena (96758 inhabitants)
50 Km NE of Scandicci (50609 inhabitants)
50 Km E of Prato (191150 inhabitants)
61 Km SW of Ravenna (159116 inhabitants)
62 Km SE of Bologna (386663 inhabitants)
62 Km N of Arezzo (99543 inhabitants)
63 Km E of Pistoia (90315 inhabitants)
69 Km W of Rimini (147750 inhabitants)
82 Km NE of Siena (53903 inhabitants)
93 Km S of Ferrara (133155 inhabitants)
94 Km SE of Modena (184973 inhabitants)
98 Km W of Pesaro (94582 inhabitants)
98 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 1.3 2021-01-01
11:40:03		 44.0058 11.7022 8 2021-07-12
16:54:57		 Bollettino Sismico Italiano INGV 86799491
Reviewed
Rev100 		ML 1.3 2021-01-01
11:40:03		 44.0062 11.7023 8 2021-01-01
11:48:55		 Sala Sismica INGV-Roma 85939171
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-01 11:40:03 ± 0.09
Latitude 44.0058 ± 0.0036
Longitude 11.7022 ± 0.0063
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 86799491

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 449
Semi-minor axis of confidence ellipse (meter) 181
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 68
Circular confidence region, given by single value of horizontal uncertainty (meter) 450.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 122
Number of associated phases, regardless of their use for origin computation 18
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.25
Epicentral distance of station closest to the epicenter (degree) 0.07195
Epicentral distance of station farthest from the epicenter (degree) 0.42628
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitudes information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.3
Num. used stations 20
Type of magnitude ML
Reference to an origin 86799491
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-02-04 16:47:58

ML:1.3

Field Value
Value 1.3
Uncertainty 0.3
Num. used stations 20
Type of magnitude ML
Reference to an origin 85939171
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-01-01 11:48:55
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CRE.HHZ. 2021-01-01T11:40:19.40 0.3 undecidable manual S 155 47.3193 50 0.02 71
IV.BRIS.HHZ. 2021-01-01T11:40:13.47 0.3 undecidable manual S 12 24.753 108 0.78 60
IV.SEI.HHZ. 2021-01-01T11:40:13.67 0.3 undecidable manual S 281 27.9498 106 -0.05 73
IV.ASQU.HHZ. 2021-01-01T11:40:12.64 0.3 undecidable manual S 163 24.2535 109 0.14 72
IV.CRE.HHZ. 2021-01-01T11:40:12.50 0.1 undecidable manual P 155 47.3193 50 -0.23 91
IV.RUFI.EHZ. 2021-01-01T11:40:12.45 0.3 undecidable manual S 220 24.1536 109 -0.03 74
IV.RONT.HHZ. 2021-01-01T11:40:11.88 0.3 undecidable manual S 266 21.5673 111 0.26 71
IV.SFI.EHZ. 2021-01-01T11:40:09.93 0.3 undecidable manual S 134 16.0728 117 0.04 75
IV.SEI.HHZ. 2021-01-01T11:40:09.20 0.1 undecidable manual P 281 27.9498 106 -0.26 93
IV.RINC.HHZ. 2021-01-01T11:40:09.80 0.3 undecidable manual S 210 15.2736 118 0.17 73
IV.BRIS.HHZ. 2021-01-01T11:40:09.04 0.1 undecidable manual P 12 24.753 108 0.18 95
IV.RUFI.EHZ. 2021-01-01T11:40:08.64 0.1 undecidable manual P 220 24.1536 109 -0.1 97
IV.ASQU.HHZ. 2021-01-01T11:40:08.67 0.1 undecidable manual P 163 24.2535 109 -0.08 98
IV.RONT.HHZ. 2021-01-01T11:40:08.35 0.1 undecidable manual P 266 21.5673 111 0.11 97
IV.RINC.HHZ. 2021-01-01T11:40:07.24 0.1 undecidable manual P 210 15.2736 118 0.14 98
IV.LMD.HHZ. 2021-01-01T11:40:07.01 0.3 undecidable manual S 3 7.9809 136 -0.57 67
IV.SFI.EHZ. 2021-01-01T11:40:07.27 0.1 undecidable manual P 134 16.0728 117 0.02 100
IV.LMD.HHZ. 2021-01-01T11:40:05.62 0.1 undecidable manual P 3 7.9809 136 -0.29 96
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LMD.HHE. ML:1.6 0.0006913955000000001 0.1024 AML other m 2021-01-01T11:40:07.04
IV.LMD.HHN. ML:1.7 0.0008283658 0.096 AML other m 2021-01-01T11:40:07.14
IV.RINC.HHE. ML:1.0 0.00008808649 0.096 AML other m 2021-01-01T11:40:10.07
IV.RINC.HHN. ML:1.0 0.000101444445 0.1408 AML other m 2021-01-01T11:40:10.07
IV.SFI.EHN. ML:1.2 0.00013635 0.16 AML other m 2021-01-01T11:40:10.69
IV.SFI.HNN. ML:1.0 0.000107434885 0.1344 AML other m 2021-01-01T11:40:10.86
IV.SFI.HNE. ML:1.0 0.00008617589 0.1024 AML other m 2021-01-01T11:40:10.92
IV.SFI.EHE. ML:0.9 0.00007572181 0.1216 AML other m 2021-01-01T11:40:11.46
IV.RONT.HHE. ML:1.8 0.0004002782 0.1024 AML other m 2021-01-01T11:40:12.85
IV.ASQU.HHN. ML:1.1 0.00008094999999999999 0.24 AML other m 2021-01-01T11:40:12.95
IV.RONT.HHN. ML:1.7 0.0003555 0.16 AML other m 2021-01-01T11:40:12.99
IV.RUFI.EHE. ML:0.7 0.00002805119 0.1024 AML other m 2021-01-01T11:40:13.29
IV.RUFI.EHN. ML:0.8 0.00003766323 0.1408 AML other m 2021-01-01T11:40:13.32
IV.BRIS.HHE. ML:1.6 0.00022155915 0.0832 AML other m 2021-01-01T11:40:13.77
IV.ASQU.HHE. ML:1.1 0.000078181305 0.1792 AML other m 2021-01-01T11:40:14.14
IV.SEI.HHE. ML:1.4 0.00012326087499999998 0.16 AML other m 2021-01-01T11:40:14.50
IV.SEI.HHN. ML:1.7 0.000268 0.16 AML other m 2021-01-01T11:40:14.41
IV.BRIS.HHN. ML:1.5 0.00018755265 0.3392 AML other m 2021-01-01T11:40:17.90
IV.CRE.HHN. ML:1.8 0.00019600000000000002 0.24 AML other m 2021-01-01T11:40:19.81
IV.CRE.HHE. ML:1.4 0.000071 0.22 AML other m 2021-01-01T11:40:20.27
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