Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 28-02-2020 and time 02:08:04 (Italy) in region 4 km NE Marradi (FI)

A magnitude ML 1.4 earthquake occured in region: 4 km NE Marradi (FI), on

  • 28-02-2020 01:08:04 (UTC)
  • 28-02-2020 02:08:04 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.1060, 11.6410 at 9 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
Marradi FI 4 3139 3139
Palazzuolo sul Senio FI 7 1154 4293
Tredozio FC 9 1212 5505
Casola Valsenio RA 13 2617 8122
Modigliana FC 13 4560 12682
Portico e San Benedetto FC 14 756 13438
Castel del Rio BO 16 1246 14684
Brisighella RA 17 7639 22323
Rocca San Casciano FC 17 1910 24233
Premilcuore FC 18 799 25032
Fontanelice BO 18 1943 26975
Borgo Tossignano BO 20 3288 30263
Dovadola FC 20 1653 31916
San Godenzo FI 20 1167 33083

Municipalities with at least 50000 inhabitants

An earthquake occurred to
28 Km SW of Faenza (58541 inhabitants)
28 Km S of Imola (69797 inhabitants)
35 Km W of Forlì (117913 inhabitants)
48 Km W of Cesena (96758 inhabitants)
48 Km NE of Firenze (382808 inhabitants)
49 Km SE of Bologna (386663 inhabitants)
50 Km E of Prato (191150 inhabitants)
53 Km NE of Scandicci (50609 inhabitants)
56 Km SW of Ravenna (159116 inhabitants)
61 Km E of Pistoia (90315 inhabitants)
74 Km N of Arezzo (99543 inhabitants)
74 Km W of Rimini (147750 inhabitants)
81 Km S of Ferrara (133155 inhabitants)
83 Km SE of Modena (184973 inhabitants)
91 Km N of Siena (53903 inhabitants)
96 Km E of Lucca (89046 inhabitants)
96 Km SE of Carpi (70699 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 1.4 2020-02-28
01:08:04		 44.1063 11.6408 9 2020-07-18
21:08:25		 Bollettino Sismico Italiano INGV 77188971
Reviewed
Rev100 		ML 1.5 2020-02-28
01:08:04		 44.11 11.6497 10 2020-02-28
01:12:41		 Sala Sismica INGV-Roma 76880601
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-02-28 01:08:04 ± 0.08
Latitude 44.1063 ± 0.0036
Longitude 11.6408 ± 0.0050
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 77188971

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 415
Semi-minor axis of confidence ellipse (meter) 304
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 95
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) 78
Number of associated phases, regardless of their use for origin computation 26
Number of defining phases 24
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.3
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.53600
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 12
Magnitudes information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.2
Num. used stations 16
Type of magnitude ML
Reference to an origin 77188971
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-03-11 11:09:47

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 14
Type of magnitude ML
Reference to an origin 76880601
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-02-28 01:12:41
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CRE.HHZ. 2020-02-28T01:08:23.68 0.3 undecidable manual S 155 59.496 50 0.47 64
IV.ASQU.HHZ. 2020-02-28T01:08:17.05 0.1 undecidable manual S 161 36.3414 50 0.03 98
IV.FAEN.HNZ. 2020-02-28T01:08:16.58 3.0 undecidable manual S 0
IV.RUFI.EHZ. 2020-02-28T01:08:15.49 0.1 undecidable manual S 199 31.5462 50 -0.26 94
IV.IMOL.EHZ. 2020-02-28T01:08:15.48 0.3 undecidable manual S 16 29.2485 107 0.41 68
IT.FAZ.HNZ. 2020-02-28T01:08:15.42 0.3 undecidable manual S 43 29.1486 107 0.39 69
IV.CRE.HHZ. 2020-02-28T01:08:15.32 0.3 undecidable manual P 155 59.496 50 0.04 70
IV.SFI.EHZ. 2020-02-28T01:08:14.54 0.1 undecidable manual S 144 27.75 108 -0.04 99
IV.SEI.HHZ. 2020-02-28T01:08:13.08 0.1 undecidable manual S 256 23.2545 112 -0.02 100
IV.RINC.HHZ. 2020-02-28T01:08:13.99 0.1 undecidable manual S 186 24.5532 110 0.46 91
IV.RONT.HHZ. 2020-02-28T01:08:12.98 0.1 undecidable manual S 233 20.7681 114 0.66 85
IV.ASQU.HHZ. 2020-02-28T01:08:11.46 0.1 positive manual P 161 36.3414 50 -0.25 93
IV.IMOL.EHZ. 2020-02-28T01:08:11.06 0.3 undecidable manual P 16 29.2485 107 0.48 67
IV.VISG.HHZ. 2020-02-28T01:08:11.47 0.1 undecidable manual S 299 18.87 116 -0.24 96
IV.SFI.EHZ. 2020-02-28T01:08:10.02 0.1 positive manual P 144 27.75 108 -0.28 94
IV.FAEN.HNZ. 2020-02-28T01:08:10.65 3.0 undecidable manual P 0
IV.RUFI.EHZ. 2020-02-28T01:08:10.77 0.1 positive manual P 199 31.5462 50 -0.2 95
IV.BRIS.HHZ. 2020-02-28T01:08:10.89 0.1 undecidable manual S 37 16.4724 119 -0.1 100
IT.FAZ.HNZ. 2020-02-28T01:08:10.91 0.3 undecidable manual P 43 29.1486 107 0.36 69
IV.RINC.HHZ. 2020-02-28T01:08:09.68 0.1 positive manual P 186 24.5532 110 -0.01 100
IV.RONT.HHZ. 2020-02-28T01:08:09.16 0.1 positive manual P 233 20.7681 114 0.17 97
IV.SEI.HHZ. 2020-02-28T01:08:09.27 0.1 positive manual P 256 23.2545 112 -0.17 97
IV.VISG.HHZ. 2020-02-28T01:08:08.31 0.1 positive manual P 299 18.87 116 -0.33 95
IV.BRIS.HHZ. 2020-02-28T01:08:07.90 0.1 positive manual P 37 16.4724 119 -0.32 95
IV.LMD.HHZ. 2020-02-28T01:08:07.99 0.1 undecidable manual S 121 6.1938 146 -0.28 97
IV.LMD.HHZ. 2020-02-28T01:08:06.40 0.1 positive manual P 121 6.1938 146 -0.25 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LMD.HHE. ML:1.4 0.00039375345 0.28 AML other m 2020-02-28T01:08:08.17
IV.LMD.HHN. ML:1.3 0.00035344552500000005 0.14 AML other m 2020-02-28T01:08:08.06
IV.BRIS.HHE. ML:1.6 0.0003545549 0.3 AML other m 2020-02-28T01:08:11.25
IV.BRIS.HHN. ML:1.9 0.00065935805 0.3 AML other m 2020-02-28T01:08:11.70
IV.VISG.HHN. ML:1.2 0.00013901379999999998 0.12 AML other m 2020-02-28T01:08:11.89
IV.VISG.HHE. ML:1.0 0.00008628888000000002 0.32 AML other m 2020-02-28T01:08:11.56
IV.RONT.HHN. ML:1.5 0.0002241401 0.12 AML other m 2020-02-28T01:08:13.50
IV.RONT.HHE. ML:1.4 0.00016877167999999998 0.44 AML other m 2020-02-28T01:08:13.17
IV.SEI.HHN. ML:1.7 0.0003110572 0.32 AML other m 2020-02-28T01:08:13.64
IV.SEI.HHE. ML:1.6 0.0002430428 0.56 AML other m 2020-02-28T01:08:13.69
IV.SFI.EHN. ML:1.2 0.00008181403500000001 0.38 AML other m 2020-02-28T01:08:14.76
IV.SFI.EHE. ML:1.1 0.00006281825750000001 0.26 AML other m 2020-02-28T01:08:15.50
IV.IMOL.HNE. ML:1.6 0.00020599569 0.3 AML other m 2020-02-28T01:08:17.44
IV.ASQU.HHE. ML:1.2 0.000056532619999999996 0.24 AML other m 2020-02-28T01:08:17.22
IV.ASQU.HHN. ML:1.1 0.0000475121 0.2 AML other m 2020-02-28T01:08:18.09
IV.CRE.HHN. ML:1.3 0.00004194472385 1.6 AML other m 2020-02-28T01:08:24.77
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