Earthquake with magnitude of ML 0.8 on date 22-09-2023 and time 14:55:10 (Italy) in region 3 km E Marradi (FI)

A magnitude ML 0.8 earthquake occured in region: 3 km E Marradi (FI), on

  • 22-09-2023 12:55:10 (UTC)
  • 22-09-2023 14:55:10 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.0720, 11.6480 at 4 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 3 3139 3139
Tredozio FC 8 1212 4351
Palazzuolo sul Senio FI 9 1154 5505
Portico e San Benedetto FC 12 756 6261
Premilcuore FC 15 799 7060
Modigliana FC 15 4560 11620
Rocca San Casciano FC 16 1910 13530
San Godenzo FI 16 1167 14697
Casola Valsenio RA 17 2617 17314
Brisighella RA 19 7639 24953
Castel del Rio BO 20 1246 26199

Municipalities with at least 50000 inhabitants

An earthquake occurred to
30 Km SW of Faenza (58541 inhabitants)
32 Km S of Imola (69797 inhabitants)
36 Km W of Forlì (117913 inhabitants)
46 Km NE of Firenze (382808 inhabitants)
48 Km W of Cesena (96758 inhabitants)
49 Km E of Prato (191150 inhabitants)
51 Km NE of Scandicci (50609 inhabitants)
53 Km SE of Bologna (386663 inhabitants)
59 Km SW of Ravenna (159116 inhabitants)
60 Km E of Pistoia (90315 inhabitants)
70 Km N of Arezzo (99543 inhabitants)
73 Km W of Rimini (147750 inhabitants)
85 Km S of Ferrara (133155 inhabitants)
86 Km SE of Modena (184973 inhabitants)
87 Km NE of Siena (53903 inhabitants)
95 Km E of Lucca (89046 inhabitants)
100 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
Reviewed
Rev100
ML 0.8 2023-09-22
12:55:10
44.0718 11.6478 4 2023-09-22
13:03:39
Sala Sismica INGV-Roma 121359791
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-09-22 12:55:10 ± 0.11
Latitude 44.0718 ± 0.0036
Longitude 11.6478 ± 0.0050
Depth (km) 4 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 121359791

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 420
Semi-minor axis of confidence ellipse (meter) 68
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 134
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) 94
Number of associated phases, regardless of their use for origin computation 15
Number of defining phases 15
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.18
Epicentral distance of station closest to the epicenter (degree) 0.03327
Epicentral distance of station farthest from the epicenter (degree) 0.24192
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitude information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.3
Num. used stations 8
Type of magnitude ML
Reference to an origin 121359791
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-09-22 13:03:39
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SFI.EHZ. 2023-09-22T12:55:19.42 0.6 undecidable manual S 139 24.4533 99 -0.01 49
IV.RINC.EHZ. 2023-09-22T12:55:18.28 0.6 undecidable manual S 189 20.868 101 0.08 49
IV.VISG.HHZ. 2023-09-22T12:55:18.33 0.6 undecidable manual S 307 21.3675 101 -0.07 49
IV.VMGN.HHZ. 2023-09-22T12:55:16.74 0.6 undecidable manual S 215 15.9729 104 0.19 48
IV.BOSL.HHZ. 2023-09-22T12:55:16.67 0.1 undecidable manual P 234 26.8509 99 0.39 91
IT.MOG.HNZ. 2023-09-22T12:55:16.37 0.6 undecidable manual S 41 14.4744 106 0.32 47
IV.SFI.EHZ. 2023-09-22T12:55:15.28 1.0 positive manual P 139 24.4533 99 -0.52 22
IV.VISG.HHZ. 2023-09-22T12:55:14.86 0.6 negative manual P 307 21.3675 101 -0.35 46
IV.RINC.EHZ. 2023-09-22T12:55:14.89 0.1 undecidable manual P 189 20.868 101 -0.2 95
IV.VMGN.HHZ. 2023-09-22T12:55:14.09 0.6 positive manual P 215 15.9729 104 -0.05 50
IV.LMD.HHZ. 2023-09-22T12:55:13.07 0.6 undecidable manual S 83 4.7952 130 0.06 50
IT.MOG.HNZ. 2023-09-22T12:55:13.87 0.1 undecidable manual P 41 14.4744 106 0.02 100
IT.MRR.HGZ. 2023-09-22T12:55:12.74 0.6 undecidable manual S 256 3.6963 138 0.01 51
IV.LMD.HHZ. 2023-09-22T12:55:11.99 0.6 undecidable manual P 83 4.7952 130 -0.11 50
IT.MRR.HGZ. 2023-09-22T12:55:11.82 0.1 undecidable manual P 256 3.6963 138 -0.11 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.VISG.HHE. ML:0.7 0.00004035 0.7 AML other m 2023-09-22T12:55:18.51
IV.VISG.HHN. ML:0.8 0.00005018446 0.1216 AML other m 2023-09-22T12:55:18.70
IV.LMD.HHE. ML:0.0 0.000086018975 0.0768 AML other m 2023-09-22T12:55:13.92
IV.LMD.HHN. ML:0.0 0.00013099595 0.0768 AML other m 2023-09-22T12:55:13.63
IV.VMGN.HHE. ML:0.2 0.000016374410700000002 0.32 AML other m 2023-09-22T12:55:19.13
IV.VMGN.HHN. ML:0.2 0.000013731425 0.384 AML other m 2023-09-22T12:55:21.35
IV.SFI.EHE. ML:0.7 0.000031602950000000005 0.2752 AML other m 2023-09-22T12:55:20.39
IV.SFI.EHN. ML:0.8 0.000046699325 0.1216 AML other m 2023-09-22T12:55:20.05
IV.SFI.HNE. ML:1.3 0.00011828416 1.4208 AML other m 2023-09-22T12:55:20.67
IV.SFI.HNN. ML:1.1 0.000079842185 0.8576 AML other m 2023-09-22T12:55:24.72
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