Earthquake with magnitude of ML 1.0 on date 22-09-2023 and time 02:22:49 (UTC) in region 3 km NE Marradi (FI)

A magnitude ML 1.0 earthquake occured in region: 3 km NE Marradi (FI), on

  • 22-09-2023 02:22:49 (UTC)
  • 22-09-2023 04:22:49 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.0900, 11.6410 at 5 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
Palazzuolo sul Senio FI 8 1154 4293
Tredozio FC 8 1212 5505
Portico e San Benedetto FC 13 756 6261
Modigliana FC 14 4560 10821
Casola Valsenio RA 15 2617 13438
Rocca San Casciano FC 17 1910 15348
Premilcuore FC 17 799 16147
Castel del Rio BO 18 1246 17393
Brisighella RA 18 7639 25032
San Godenzo FI 18 1167 26199
Fontanelice BO 20 1943 28142

Municipalities with at least 50000 inhabitants

An earthquake occurred to
29 Km SW of Faenza (58541 inhabitants)
30 Km S of Imola (69797 inhabitants)
35 Km W of Forlì (117913 inhabitants)
47 Km NE of Firenze (382808 inhabitants)
48 Km W of Cesena (96758 inhabitants)
49 Km E of Prato (191150 inhabitants)
51 Km SE of Bologna (386663 inhabitants)
52 Km NE of Scandicci (50609 inhabitants)
58 Km SW of Ravenna (159116 inhabitants)
60 Km E of Pistoia (90315 inhabitants)
72 Km N of Arezzo (99543 inhabitants)
74 Km W of Rimini (147750 inhabitants)
83 Km S of Ferrara (133155 inhabitants)
84 Km SE of Modena (184973 inhabitants)
89 Km N of Siena (53903 inhabitants)
95 Km E of Lucca (89046 inhabitants)
98 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 1.0 2023-09-22
02:22:49
44.0903 11.6407 5 2023-09-22
02:26:35
Sala Sismica INGV-Roma 121334501
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-09-22 02:22:49 ± 0.1
Latitude 44.0903 ± 0.0027
Longitude 11.6407 ± 0.0038
Depth (km) 5 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 121334501

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 348
Semi-minor axis of confidence ellipse (meter) 210
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 322
Circular confidence region, given by single value of horizontal uncertainty (meter) 350.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 105
Number of associated phases, regardless of their use for origin computation 18
Number of defining phases 12
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) 0.24911
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 6
Magnitude information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 121334501
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-09-22 02:26:35
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.PIEI.HHZ. 2023-09-22T02:23:06.69 3.0 negative manual P 2.32 0
IV.FRON.EHZ. 2023-09-22T02:23:05.83 3.0 negative manual P -0.16 0
IV.BOSL.HHZ. 2023-09-22T02:22:59.18 0.6 undecidable manual S 230 27.6501 100 0.17 47
IV.VISG.HHZ. 2023-09-22T02:22:56.43 0.6 undecidable manual S 304 19.7691 104 0.11 48
IV.MOCL.EHZ. 2023-09-22T02:22:56.29 3.0 negative manual P 0.4 0
IV.VMGN.HHZ. 2023-09-22T02:22:55.66 0.6 undecidable manual S 210 17.3715 105 0.14 48
IV.SFI.EHZ. 2023-09-22T02:22:54.16 3.0 negative manual P 0.11 0
IT.MOG.HNE. 2023-09-22T02:22:54.50 0.6 undecidable manual S 49 13.3755 110 0.29 47
IV.BOSL.HHZ. 2023-09-22T02:22:54.73 1.0 negative manual P 230 27.6501 100 -0.16 23
IV.RUFI.EHZ. 2023-09-22T02:22:54.82 3.0 undecidable manual P 0.04 0
IV.SEI.HHZ. 2023-09-22T02:22:53.66 3.0 positive manual P 0.01 0
IV.VISG.HHZ. 2023-09-22T02:22:53.16 0.1 undecidable manual P 304 19.7691 104 -0.18 95
IV.VMGN.HHZ. 2023-09-22T02:22:52.87 0.1 positive manual P 210 17.3715 105 -0.01 99
IT.MOG.HNE. 2023-09-22T02:22:52.15 0.1 undecidable manual P 49 13.3755 110 0.03 99
IT.MRR.HGZ. 2023-09-22T02:22:51.52 0.6 undecidable manual S 226 4.1958 139 0.05 50
IV.LMD.HHZ. 2023-09-22T02:22:51.67 0.6 undecidable manual S 105 5.4945 131 -0.13 49
IT.MRR.HGZ. 2023-09-22T02:22:50.49 0.1 undecidable manual P 226 4.1958 139 -0.05 100
IV.LMD.HHZ. 2023-09-22T02:22:50.52 1.0 undecidable manual P 105 5.4945 131 -0.21 24
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.VMGN.HHE. ML:1.0 0.00009725 0.42 AML other m 2023-09-22T02:22:56.35
IV.VMGN.HHN. ML:1.1 0.00011565 0.4 AML other m 2023-09-22T02:22:56.37
IV.VISG.HHN. ML:0.9 0.00006395000000000001 1.42 AML other m 2023-09-22T02:22:56.14
IV.VISG.HHE. ML:0.7 0.00004295 1.08 AML other m 2023-09-22T02:22:57.98
IV.SEI.HHN. ML:1.6 0.0002855 0.26 AML other m 2023-09-22T02:22:57.91
IV.SFI.EHN. ML:1.0 0.000061 0.2 AML other m 2023-09-22T02:22:58.78
IV.SFI.EHE. ML:1.1 0.00007915 1.24 AML other m 2023-09-22T02:22:59.23
IV.BOSL.HHN. ML:0.9 0.0000447 0.24 AML other m 2023-09-22T02:22:59.61
IV.BOSL.HHE. ML:0.7 0.0000315 1.24 AML other m 2023-09-22T02:22:59.62
IV.SEI.HHE. ML:1.3 0.00014800000000000002 0.42 AML other m 2023-09-22T02:23:00.21
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