Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 01-06-2020 and time 11:46:23 (UTC) in region 5 km N Marradi (FI)

A magnitude ML 1.6 earthquake occured in region: 5 km N Marradi (FI), on

  • 01-06-2020 11:46:23 (UTC)
  • 01-06-2020 13:46:23 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.1170, 11.6230 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 5 3139 3139
Palazzuolo sul Senio FI 6 1154 4293
Tredozio FC 11 1212 5505
Casola Valsenio RA 12 2617 8122
Modigliana FC 14 4560 12682
Castel del Rio BO 14 1246 13928
Portico e San Benedetto FC 16 756 14684
Brisighella RA 17 7639 22323
Fontanelice BO 17 1943 24266
Borgo Tossignano BO 18 3288 27554
Rocca San Casciano FC 19 1910 29464
Firenzuola FI 19 4726 34190
Riolo Terme RA 20 5720 39910
Premilcuore FC 20 799 40709

Municipalities with at least 50000 inhabitants

An earthquake occurred to
27 Km S of Imola (69797 inhabitants)
28 Km SW of Faenza (58541 inhabitants)
35 Km W of Forlì (117913 inhabitants)
48 Km SE of Bologna (386663 inhabitants)
48 Km NE of Firenze (382808 inhabitants)
50 Km NE of Prato (191150 inhabitants)
50 Km W of Cesena (96758 inhabitants)
53 Km NE of Scandicci (50609 inhabitants)
57 Km SW of Ravenna (159116 inhabitants)
60 Km E of Pistoia (90315 inhabitants)
75 Km N of Arezzo (99543 inhabitants)
76 Km W of Rimini (147750 inhabitants)
80 Km S of Ferrara (133155 inhabitants)
81 Km SE of Modena (184973 inhabitants)
92 Km N of Siena (53903 inhabitants)
94 Km SE of Carpi (70699 inhabitants)
95 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 1.6 2020-06-01
11:46:23		 44.1167 11.6232 9 2020-11-19
12:36:48		 Bollettino Sismico Italiano INGV 80091591
Reviewed
Rev100 		ML 1.7 2020-06-01
11:46:22		 44.1302 11.6182 10 2020-06-01
12:01:35		 Sala Sismica INGV-Roma 79782191
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-06-01 11:46:23 ± 0.12
Latitude 44.1167 ± 0.0054
Longitude 11.6232 ± 0.0075
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 80091591

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 650
Semi-minor axis of confidence ellipse (meter) 326
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 269
Circular confidence region, given by single value of horizontal uncertainty (meter) 650.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 79
Number of associated phases, regardless of their use for origin computation 22
Number of defining phases 22
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.4
Epicentral distance of station closest to the epicenter (degree) 0.07195
Epicentral distance of station farthest from the epicenter (degree) 0.34174
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 11
Magnitudes information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 14
Type of magnitude ML
Reference to an origin 80091591
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-06-11 15:02:48

ML:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations 18
Type of magnitude ML
Reference to an origin 79782191
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-06-01 12:01:35
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ASQU.HHZ. 2020-06-01T11:46:36.48 0.3 undecidable manual S 159 37.9287 50 0.47 65
IV.MTRZ.HNN. 2020-06-01T11:46:34.27 0.3 undecidable manual S 324 26.8509 109 1.41 43
IV.IMOL.EHZ. 2020-06-01T11:46:34.45 0.3 undecidable manual S 19 28.5492 108 1.03 52
IV.RUFI.EHZ. 2020-06-01T11:46:34.50 0.3 undecidable manual S 196 32.2455 50 0.01 72
IV.SFI.EHZ. 2020-06-01T11:46:33.82 0.3 undecidable manual S 143 29.5482 107 0.09 71
IV.RINC.HHZ. 2020-06-01T11:46:32.68 0.3 undecidable manual S 183 25.5522 110 0.25 70
IV.SEI.HHZ. 2020-06-01T11:46:31.34 0.3 undecidable manual S 252 22.1556 112 0 74
IV.RONT.HHZ. 2020-06-01T11:46:31.36 0.3 undecidable manual S 228 20.3685 114 0.59 64
IV.ASQU.HHZ. 2020-06-01T11:46:30.37 0.1 undecidable manual P 159 37.9287 50 -0.14 93
IV.RUFI.EHZ. 2020-06-01T11:46:29.37 0.1 undecidable manual P 196 32.2455 50 -0.27 91
IV.BRIS.HHZ. 2020-06-01T11:46:29.28 0.3 undecidable manual S 44 16.5723 119 -0.28 70
IV.RINC.HHZ. 2020-06-01T11:46:28.50 0.3 undecidable manual P 183 25.5522 110 0.05 73
IV.SFI.EHZ. 2020-06-01T11:46:28.89 0.1 undecidable manual P 143 29.5482 107 -0.31 91
IV.MTRZ.HNN. 2020-06-01T11:46:28.88 0.1 undecidable manual P 324 26.8509 109 0.18 94
IV.IMOL.EHZ. 2020-06-01T11:46:28.93 0.1 undecidable manual P 19 28.5492 108 -0.09 95
IV.VISG.HHZ. 2020-06-01T11:46:28.96 0.3 undecidable manual S 298 17.0718 118 -0.76 60
IV.RONT.HHZ. 2020-06-01T11:46:27.61 0.1 positive manual P 228 20.3685 114 0.12 96
IV.LMD.HHZ. 2020-06-01T11:46:27.36 0.3 undecidable manual S 123 7.9809 139 0.14 73
IV.SEI.HHZ. 2020-06-01T11:46:27.55 0.1 positive manual P 252 22.1556 112 -0.27 93
IV.VISG.HHZ. 2020-06-01T11:46:26.32 0.1 undecidable manual P 298 17.0718 118 -0.56 87
IV.BRIS.HHZ. 2020-06-01T11:46:26.44 0.1 positive manual P 44 16.5723 119 -0.35 92
IV.LMD.HHZ. 2020-06-01T11:46:25.41 0.1 positive manual P 123 7.9809 139 -0.03 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LMD.HHE. ML:1.7 0.0007325 0.54 AML other m 2020-06-01T11:46:27.69
IV.LMD.HHN. ML:1.6 0.000687 0.2 AML other m 2020-06-01T11:46:28.79
IV.VISG.HHN. ML:1.8 0.000596 0.1 AML other m 2020-06-01T11:46:29.49
IV.BRIS.HHN. ML:2.0 0.0010075000000000001 1.04 AML other m 2020-06-01T11:46:29.52
IV.BRIS.HHE. ML:2.2 0.0013189999999999999 0.1 AML other m 2020-06-01T11:46:29.57
IV.VISG.HHE. ML:1.6 0.000373 0.98 AML other m 2020-06-01T11:46:29.75
IV.SEI.HHE. ML:1.9 0.0005629999999999999 0.32 AML other m 2020-06-01T11:46:33.38
IV.RINC.HHN. ML:1.5 0.00016849999999999998 0.54 AML other m 2020-06-01T11:46:33.33
IV.RINC.HHE. ML:1.6 0.00023400000000000002 1.22 AML other m 2020-06-01T11:46:34.87
IV.SFI.EHE. ML:1.2 0.0000853 0.52 AML other m 2020-06-01T11:46:34.71
IV.SFI.EHN. ML:1.3 0.00010235 0.14 AML other m 2020-06-01T11:46:35.16
IV.ASQU.HHE. ML:1.3 0.00007875 1.18 AML other m 2020-06-01T11:46:37.86
IV.ASQU.HHN. ML:1.3 0.0000816 0.62 AML other m 2020-06-01T11:46:38.59
IV.RONT.HHE. ML:2.2 0.0010915048000000001 0.256 AML other m 2020-06-01T11:46:33.41
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