Earthquake with magnitude of ML 0.3 on date 20-09-2023 and time 16:55:54 (UTC) in region 5 km E Marradi (FI)

A magnitude ML 0.3 earthquake occured in region: 5 km E Marradi (FI), on

  • 20-09-2023 16:55:54 (UTC)
  • 20-09-2023 18:55:54 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.0670, 11.6690 at 6 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.

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
Tredozio FC 6 1212 4351
Portico e San Benedetto FC 10 756 5107
Palazzuolo sul Senio FI 11 1154 6261
Premilcuore FC 13 799 7060
Rocca San Casciano FC 14 1910 8970
Modigliana FC 14 4560 13530
San Godenzo FI 16 1167 14697
Casola Valsenio RA 18 2617 17314
Dovadola FC 19 1653 18967
Brisighella RA 19 7639 26606

Municipalities with at least 50000 inhabitants

An earthquake occurred to
30 Km SW of Faenza (58541 inhabitants)
32 Km S of Imola (69797 inhabitants)
34 Km SW of Forlì (117913 inhabitants)
47 Km W of Cesena (96758 inhabitants)
47 Km NE of Firenze (382808 inhabitants)
50 Km E of Prato (191150 inhabitants)
52 Km NE of Scandicci (50609 inhabitants)
54 Km SE of Bologna (386663 inhabitants)
58 Km SW of Ravenna (159116 inhabitants)
62 Km E of Pistoia (90315 inhabitants)
69 Km N of Arezzo (99543 inhabitants)
72 Km W of Rimini (147750 inhabitants)
86 Km S of Ferrara (133155 inhabitants)
87 Km NE of Siena (53903 inhabitants)
87 Km SE of Modena (184973 inhabitants)
97 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 0.3 2023-09-20
16:55:54
44.067 11.6692 6 2023-09-20
17:06:13
Sala Sismica INGV-Roma 121284271
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-09-20 16:55:54 ± 0.11
Latitude 44.0670 ± 0.0027
Longitude 11.6692 ± 0.0038
Depth (km) 6 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 121284271

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 319
Semi-minor axis of confidence ellipse (meter) 137
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 151
Circular confidence region, given by single value of horizontal uncertainty (meter) 320.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 88
Number of associated phases, regardless of their use for origin computation 32
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.14
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.25181
Number of stations at which the event was observed 22
Number of stations from which data was used for origin computation 9
Magnitude information

ML:0.3

Field Value
Value 0.3
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 121284271
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-09-20 17:06:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MRB1.HHZ. 2023-09-20T16:57:39.38 3.0 undecidable manual Sg 6.44 0
IV.AGLI.HHZ. 2023-09-20T16:57:33.69 3.0 undecidable manual Sn 0.94 0
XE.MORMA.HHZ. 2023-09-20T16:56:59.50 3.0 undecidable manual Pn -8.08 0
IX.COL3.HHZ.02 2023-09-20T16:56:58.12 3.0 negative manual Pg 3.63 0
IV.MRLC.HHZ. 2023-09-20T16:56:56.97 3.0 positive manual Pg 2.32 0
IV.LPEL.HHZ. 2023-09-20T16:56:53.97 3.0 undecidable manual Sn -9.99 0
IV.AGLI.HHZ. 2023-09-20T16:56:47.33 3.0 undecidable manual Pn 0.01 0
IV.CFMN.HNZ. 2023-09-20T16:56:44.28 3.0 undecidable manual Pn -2.26 0
IV.FIAM.HHZ. 2023-09-20T16:56:43.79 3.0 undecidable manual Sn -8.36 0
IV.FAGN.HHZ. 2023-09-20T16:56:43.52 3.0 undecidable manual Sn -9.99 0
IV.GUMA.HHZ. 2023-09-20T16:56:29.69 3.0 undecidable manual Sn -7.47 0
IV.CAFI.HHZ. 2023-09-20T16:56:17.87 3.0 undecidable manual Sg -2.97 0
OX.CIMO.HHZ. 2023-09-20T16:56:17.58 3.0 positive manual Pn -7.77 0
IV.ARVD.HHZ. 2023-09-20T16:56:04.54 3.0 undecidable manual P -3.74 0
IV.BOSL.HHN. 2023-09-20T16:56:04.83 0.6 undecidable manual S 237 27.9498 102 0.07 48
IV.VISG.HHZ. 2023-09-20T16:56:03.23 0.6 undecidable manual S 306 23.0547 105 0.12 48
IV.SFI.EHZ. 2023-09-20T16:56:03.02 0.6 undecidable manual S 142 22.9548 105 -0.04 48
IV.SEI.HHZ. 2023-09-20T16:56:03.59 0.6 undecidable manual S 267 24.8529 104 -0.1 48
IV.RINC.EHE. 2023-09-20T16:56:02.43 0.6 undecidable manual S 194 20.6682 107 0.13 48
IV.VMGN.HHZ. 2023-09-20T16:56:01.26 0.6 undecidable manual S 221 16.5723 110 0.31 46
IT.MOG.HNN. 2023-09-20T16:56:00.47 0.6 undecidable manual S 34 13.875 114 0.39 46
IV.BOSL.HHN. 2023-09-20T16:56:00.18 0.6 undecidable manual P 237 27.9498 102 -0.38 45
IV.SFI.EHZ. 2023-09-20T16:55:59.43 1.0 undecidable manual P 142 22.9548 105 -0.15 24
IV.SEI.HHZ. 2023-09-20T16:55:59.70 0.6 negative manual P 267 24.8529 104 -0.25 46
IV.RINC.EHE. 2023-09-20T16:55:59.14 0.6 undecidable manual P 194 20.6682 107 0 49
IV.VISG.HHZ. 2023-09-20T16:55:59.46 0.6 undecidable manual P 306 23.0547 105 -0.15 47
IV.VMGN.HHZ. 2023-09-20T16:55:58.54 0.6 positive manual P 221 16.5723 110 0.17 48
IT.MOG.HNN. 2023-09-20T16:55:57.95 1.0 undecidable manual P 34 13.875 114 0.09 24
IT.MRR.HGE. 2023-09-20T16:55:57.66 0.3 undecidable manual S 266 5.2947 139 0.03 75
IV.LMD.HHZ. 2023-09-20T16:55:57.03 0.3 undecidable manual S 69 3.1968 152 -0.2 73
IT.MRR.HGE. 2023-09-20T16:55:56.48 0.1 undecidable manual P 266 5.2947 139 0.04 100
IV.LMD.HHZ. 2023-09-20T16:55:56.13 1.0 undecidable manual P 69 3.1968 152 -0.09 25
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.VMGN.HHE. ML:0.0 0.0000085652395 0.192 AML other m 2023-09-20T16:56:02.47
IV.VMGN.HHN. ML:0.0 0.000011312338500000002 0.1792 AML other m 2023-09-20T16:56:02.16
IV.SFI.EHE. ML:0.5 0.000019715705 1.2032 AML other m 2023-09-20T16:56:03.67
IV.SFI.EHN. ML:0.6 0.0000236315015 1.6128 AML other m 2023-09-20T16:56:03.27
IV.VISG.HHE. ML:0.3 0.00001382872 2.112 AML other m 2023-09-20T16:56:04.77
IV.VISG.HHN. ML:0.2 0.000011460732000000001 0.5632 AML other m 2023-09-20T16:56:03.52
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
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QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download