Earthquake with magnitude of ML 0.8 on date 24-09-2023 and time 22:49:47 (UTC) in region 2 km E Marradi (FI)

A magnitude ML 0.8 earthquake occured in region: 2 km E Marradi (FI), on

  • 24-09-2023 22:49:47 (UTC)
  • 25-09-2023 00:49:47 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.0780, 11.6400 at 7 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 2 3139 3139
Palazzuolo sul Senio FI 8 1154 4293
Tredozio FC 8 1212 5505
Portico e San Benedetto FC 13 756 6261
Modigliana FC 15 4560 10821
Premilcuore FC 16 799 11620
Rocca San Casciano FC 16 1910 13530
Casola Valsenio RA 16 2617 16147
San Godenzo FI 17 1167 17314
Castel del Rio BO 19 1246 18560
Brisighella RA 19 7639 26199

Municipalities with at least 50000 inhabitants

An earthquake occurred to
30 Km SW of Faenza (58541 inhabitants)
31 Km S of Imola (69797 inhabitants)
36 Km W of Forlì (117913 inhabitants)
46 Km NE of Firenze (382808 inhabitants)
49 Km E of Prato (191150 inhabitants)
49 Km W of Cesena (96758 inhabitants)
51 Km NE of Scandicci (50609 inhabitants)
52 Km SE of Bologna (386663 inhabitants)
59 Km SW of Ravenna (159116 inhabitants)
60 Km E of Pistoia (90315 inhabitants)
71 Km N of Arezzo (99543 inhabitants)
74 Km W of Rimini (147750 inhabitants)
84 Km S of Ferrara (133155 inhabitants)
85 Km SE of Modena (184973 inhabitants)
88 Km N of Siena (53903 inhabitants)
95 Km E of Lucca (89046 inhabitants)
99 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 2023-09-24
22:49:47
44.0777 11.6395 7 2023-09-24
22:56:50
Sala Sismica INGV-Roma 121430071
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-09-24 22:49:47 ± 0.09
Latitude 44.0777 ± 0.0027
Longitude 11.6395 ± 0.0038
Depth (km) 7 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 121430071

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 276
Semi-minor axis of confidence ellipse (meter) 101
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 188
Circular confidence region, given by single value of horizontal uncertainty (meter) 280.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 98
Number of associated phases, regardless of their use for origin computation 19
Number of defining phases 19
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.16
Epicentral distance of station closest to the epicenter (degree) 0.02968
Epicentral distance of station farthest from the epicenter (degree) 0.25721
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 10
Magnitude information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.3
Num. used stations 6
Type of magnitude ML
Reference to an origin 121430071
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-09-24 22:56:50
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.BOSL.HHE. 2023-09-24T22:49:57.42 0.1 undecidable manual S 233 26.6511 104 0.03 96
IV.RUFI.EHE. 2023-09-24T22:49:57.90 0.1 undecidable manual S 201 28.5492 103 -0.12 94
IV.SFI.EHZ. 2023-09-24T22:49:56.92 0.1 undecidable manual S 139 25.3524 105 -0.02 96
IV.SEI.HHZ. 2023-09-24T22:49:55.99 0.1 undecidable manual S 263 22.5552 107 -0.01 97
IV.RINC.EHZ. 2023-09-24T22:49:55.82 0.1 undecidable manual S 187 21.3675 107 0.2 94
IV.VISG.HHZ. 2023-09-24T22:49:55.41 0.1 undecidable manual S 307 20.4684 108 0.08 96
IV.VMGN.HHZ. 2023-09-24T22:49:54.25 0.1 undecidable manual S 212 16.0728 113 0.35 91
IV.RUFI.EHE. 2023-09-24T22:49:53.44 0.1 undecidable manual P 201 28.5492 103 -0.28 91
IV.BOSL.HHE. 2023-09-24T22:49:53.22 0.1 undecidable manual P 233 26.6511 104 -0.14 94
IV.SFI.EHZ. 2023-09-24T22:49:52.96 0.1 undecidable manual P 139 25.3524 105 -0.14 94
IV.RINC.EHZ. 2023-09-24T22:49:52.41 0.1 undecidable manual P 187 21.3675 107 0.07 96
IV.VISG.HHZ. 2023-09-24T22:49:52.16 1.0 negative manual P 307 20.4684 108 0 24
IV.SEI.HHZ. 2023-09-24T22:49:52.37 0.3 negative manual P 263 22.5552 107 -0.19 70
IT.MOG.HNZ. 2023-09-24T22:49:51.30 0.1 undecidable manual P 45 14.4744 115 0.26 93
IV.VMGN.HHZ. 2023-09-24T22:49:51.56 1.0 negative manual P 212 16.0728 113 0.22 23
IV.LMD.HHZ. 2023-09-24T22:49:50.80 0.1 undecidable manual S 90 5.3946 141 -0.04 99
IT.MRR.HGE. 2023-09-24T22:49:50.30 0.1 undecidable manual S 242 3.2967 154 -0.14 98
IV.LMD.HHZ. 2023-09-24T22:49:49.48 0.6 undecidable manual P 90 5.3946 141 -0.09 49
IT.MRR.HGE. 2023-09-24T22:49:49.31 0.1 undecidable manual P 242 3.2967 154 -0.03 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.VMGN.HHE. ML:0.6 0.000039 0.42 AML other m 2023-09-24T22:49:54.75
IV.VISG.HHN. ML:0.7 0.0000401 1.16 AML other m 2023-09-24T22:49:55.71
IV.VISG.HHE. ML:0.7 0.00003555 0.48 AML other m 2023-09-24T22:49:55.76
IV.SEI.HHN. ML:1.4 0.000189 0.34 AML other m 2023-09-24T22:49:56.32
IV.VMGN.HHN. ML:0.7 0.0000436 1.28 AML other m 2023-09-24T22:49:56.02
IV.SEI.HHE. ML:1.1 0.00008 1.18 AML other m 2023-09-24T22:49:57.19
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