Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.9 on date 02-10-2020 and time 20:15:46 (Italy) in region 5 km NW Tredozio (FC)

A magnitude ML 0.9 earthquake occured in region: 5 km NW Tredozio (FC), on

  • 02-10-2020 18:15:46 (UTC)
  • 02-10-2020 20:15:46 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.1040, 11.6880 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
Tredozio FC 5 1212 1212
Marradi FI 7 3139 4351
Modigliana FC 10 4560 8911
Palazzuolo sul Senio FI 11 1154 10065
Portico e San Benedetto FC 11 756 10821
Rocca San Casciano FC 13 1910 12731
Casola Valsenio RA 14 2617 15348
Brisighella RA 15 7639 22987
Premilcuore FC 16 799 23786
Dovadola FC 16 1653 25439
Castel del Rio BO 19 1246 26685
Riolo Terme RA 20 5720 32405
Fontanelice BO 20 1943 34348

Municipalities with at least 50000 inhabitants

An earthquake occurred to
26 Km SW of Faenza (58541 inhabitants)
28 Km S of Imola (69797 inhabitants)
31 Km W of Forlì (117913 inhabitants)
45 Km W of Cesena (96758 inhabitants)
51 Km NE of Firenze (382808 inhabitants)
51 Km SE of Bologna (386663 inhabitants)
53 Km E of Prato (191150 inhabitants)
54 Km SW of Ravenna (159116 inhabitants)
56 Km NE of Scandicci (50609 inhabitants)
64 Km E of Pistoia (90315 inhabitants)
70 Km W of Rimini (147750 inhabitants)
73 Km N of Arezzo (99543 inhabitants)
82 Km S of Ferrara (133155 inhabitants)
85 Km SE of Modena (184973 inhabitants)
92 Km NE of Siena (53903 inhabitants)
99 Km SE of Carpi (70699 inhabitants)
99 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
Reviewed
Rev100 		ML 0.9 2020-10-02
18:15:46		 44.1042 11.6875 10 2020-10-02
18:27:04		 Sala Sismica INGV-Roma 83449791
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-10-02 18:15:46 ± 0.05
Latitude 44.1042 ± 0.0036
Longitude 11.6875 ± 0.0038
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 83449791

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 417
Semi-minor axis of confidence ellipse (meter) 303
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 345
Circular confidence region, given by single value of horizontal uncertainty (meter) 420.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 125
Number of associated phases, regardless of their use for origin computation 25
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.13
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.29498
Number of stations at which the event was observed 16
Number of stations from which data was used for origin computation 7
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.3
Num. used stations 8
Type of magnitude ML
Reference to an origin 83449791
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-10-02 18:27:04
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CORL.HHZ. 2020-10-02T18:18:24.28 3.0 undecidable manual Sn -3 0
IX.STN3.HHZ.02 2020-10-02T18:17:36.60 3.0 undecidable manual Sn -5.22 0
XK.GIZZ.HHZ. 2020-10-02T18:17:29.41 3.0 positive manual Pg 25.469999 0
IV.PTRJ.HHZ. 2020-10-02T18:17:26.93 3.0 undecidable manual Sg 12.13 0
IV.ECTS.HHZ. 2020-10-02T18:17:14.62 3.0 negative manual Pn 1.48 0
IX.STN3.HHZ.02 2020-10-02T18:17:01.85 3.0 negative manual Pg 18.879999 0
IV.TOLF.HHZ. 2020-10-02T18:16:47.86 3.0 undecidable manual Sg 0.28 0
SL.KOGS.BHZ. 2020-10-02T18:16:45.02 3.0 undecidable manual Pg 23.389999 0
IV.PTRJ.HHZ. 2020-10-02T18:16:35.56 3.0 undecidable manual Pn 7.77 0
IV.TRIF.CHZ. 2020-10-02T18:16:21.26 3.0 undecidable manual Sn -7.31 0
IV.RUFI.EHZ. 2020-10-02T18:15:58.40 0.3 undecidable manual S 206 32.745 50 0.08 72
IV.SFI.EHZ. 2020-10-02T18:15:56.32 0.6 undecidable manual S 150 25.5522 50 -0.06 50
IV.SEI.HHZ. 2020-10-02T18:15:56.89 0.3 undecidable manual S 258 26.751 50 0.17 72
IV.RINC.HHZ. 2020-10-02T18:15:56.33 0.3 undecidable manual S 195 24.9528 50 0.09 73
IV.RONT.HHZ. 2020-10-02T18:15:56.02 0.3 undecidable manual S 239 23.754 50 0.12 73
IV.VISG.HHN. 2020-10-02T18:15:55.34 0.6 undecidable manual S 295 22.2555 115 -0.14 49
IV.PE3.EHZ. 2020-10-02T18:15:55.25 3.0 undecidable manual P 0.19 0
IV.RUFI.EHZ. 2020-10-02T18:15:53.44 0.1 undecidable manual P 206 32.745 50 -0.08 98
IV.BRIS.HHZ. 2020-10-02T18:15:53.34 0.3 undecidable manual S 25 14.7741 125 0.12 75
IV.RINC.HHZ. 2020-10-02T18:15:52.58 0.6 undecidable manual P 195 24.9528 50 0.26 47
IV.RONT.HHZ. 2020-10-02T18:15:52.15 0.6 positive manual P 239 23.754 50 0.03 50
IV.SFI.EHZ. 2020-10-02T18:15:52.21 0.1 undecidable manual P 150 25.5522 50 -0.19 97
IV.SEI.HHZ. 2020-10-02T18:15:52.48 0.1 undecidable manual P 258 26.751 50 -0.12 98
IV.VISG.HHN. 2020-10-02T18:15:51.71 0.3 undecidable manual P 295 22.2555 115 -0.17 73
IV.BRIS.HHZ. 2020-10-02T18:15:50.68 0.1 negative manual P 25 14.7741 125 0.1 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.BRIS.HHE. ML:1.2 0.00016412096 0.1536 AML other m 2020-10-02T18:15:53.68
IV.BRIS.HHN. ML:1.3 0.00018165635 0.1024 AML other m 2020-10-02T18:15:53.78
IV.RONT.HHE. ML:0.8 0.00004133282 0.192 AML other m 2020-10-02T18:15:57.80
IV.RONT.HHN. ML:1.0 0.000053939015 0.1792 AML other m 2020-10-02T18:15:56.80
IV.SFI.EHE. ML:0.2 0.000009500758499999999 0.1152 AML other m 2020-10-02T18:15:57.23
IV.SFI.EHN. ML:0.2 0.000011468385 0.1408 AML other m 2020-10-02T18:15:56.50
IV.SEI.HHE. ML:1.0 0.000059840205000000004 0.3456 AML other m 2020-10-02T18:15:58.02
IV.SEI.HHN. ML:0.9 0.000041438660000000004 0.128 AML other m 2020-10-02T18:15:57.52
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