Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.3 on date 17-09-2023 and time 18:48:05 (Italy) in region Casalfiumanese (BO)

A magnitude ML 1.3 earthquake occured in region: Casalfiumanese (BO), on

  • 17-09-2023 16:48:05 (UTC)
  • 17-09-2023 18:48:05 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.2950, 11.6180 at 20 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.

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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
Casalfiumanese BO 0 3438 3438
Borgo Tossignano BO 3 3288 6726
Fontanelice BO 6 1943 8669
Dozza BO 7 6652 15321
Casola Valsenio RA 8 2617 17938
Riolo Terme RA 9 5720 23658
Imola BO 10 69797 93455
Castel San Pietro Terme BO 12 20811 114266
Castel del Rio BO 13 1246 115512
Brisighella RA 15 7639 123151
Castel Bolognese RA 15 9554 132705
Castel Guelfo di Bologna BO 16 4455 137160
Monterenzio BO 17 6035 143195
Mordano BO 19 4760 147955
Solarolo RA 20 4488 152443
Bagnara di Romagna RA 20 2429 154872

Municipalities with at least 50000 inhabitants

An earthquake occurred to
10 Km SW of Imola (69797 inhabitants)
21 Km W of Faenza (58541 inhabitants)
31 Km SE of Bologna (386663 inhabitants)
35 Km W of Forlì (117913 inhabitants)
48 Km W of Ravenna (159116 inhabitants)
53 Km W of Cesena (96758 inhabitants)
60 Km S of Ferrara (133155 inhabitants)
62 Km NE of Prato (191150 inhabitants)
65 Km NE of Firenze (382808 inhabitants)
67 Km SE of Modena (184973 inhabitants)
69 Km NE of Pistoia (90315 inhabitants)
69 Km NE of Scandicci (50609 inhabitants)
79 Km SE of Carpi (70699 inhabitants)
80 Km W of Rimini (147750 inhabitants)
87 Km S of Rovigo (51867 inhabitants)
90 Km E of Reggio nell'Emilia (171345 inhabitants)
95 Km N of Arezzo (99543 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 1.3 2023-09-17
16:48:05		 44.2953 11.6177 20 2023-09-17
17:20:53		 Sala Sismica INGV-Roma 121140041
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-09-17 16:48:05 ± 0.26
Latitude 44.2953 ± 0.0099
Longitude 11.6177 ± 0.0126
Depth (km) 20 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 121140041

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 980
Semi-minor axis of confidence ellipse (meter) 677
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 122
Circular confidence region, given by single value of horizontal uncertainty (meter) 980.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 137
Number of associated phases, regardless of their use for origin computation 21
Number of defining phases 16
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.29
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.71766
Number of stations at which the event was observed 16
Number of stations from which data was used for origin computation 11
Magnitude information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.3
Num. used stations 17
Type of magnitude ML
Reference to an origin 121140041
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-09-17 17:20:53
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.AGLI.HHZ. 2023-09-17T16:49:45.72 3.0 undecidable manual Sn 1.37 0
IV.QLNO.HHZ. 2023-09-17T16:49:16.96 3.0 undecidable manual Sn 3.32 0
IV.CTI.HHZ. 2023-09-17T16:49:00.19 3.0 undecidable manual Sg 0 0
IV.LPEL.HHZ. 2023-09-17T16:48:56.11 3.0 undecidable manual Pn 4.46 0
IV.ZOVE.EHZ. 2023-09-17T16:48:44.45 3.0 undecidable manual S -1.28 0
IV.CRE.HHZ. 2023-09-17T16:48:19.81 0.3 undecidable manual P 160 79.6647 98 0.35 85
IV.SEI.HHZ. 2023-09-17T16:48:18.00 0.3 undecidable manual S 218 33.744 112 0.36 92
IV.VMGN.HHZ. 2023-09-17T16:48:18.94 0.3 undecidable manual S 190 38.4282 109 0.14 96
IV.RUFI.EHZ. 2023-09-17T16:48:15.07 0.3 undecidable manual P 190 51.5151 103 -0.12 94
IV.SFI.EHZ. 2023-09-17T16:48:14.36 0.3 undecidable manual P 157 47.0196 105 -0.16 94
IV.MOCL.EHZ. 2023-09-17T16:48:14.92 0.6 undecidable manual P 227 47.4192 105 0.34 61
IV.RINC.EHE. 2023-09-17T16:48:14.29 0.3 undecidable manual P 181 45.3213 106 0.01 97
IV.IMOL.EHZ. 2023-09-17T16:48:13.54 0.3 undecidable manual S 54 12.1767 144 0.53 91
IV.VMGN.HHZ. 2023-09-17T16:48:13.12 0.3 undecidable manual P 190 38.4282 109 -0.13 96
IV.MTRZ.HHZ. 2023-09-17T16:48:13.82 0.3 undecidable manual S 277 15.4734 137 0.26 97
IV.FNVD.HHZ. 2023-09-17T16:48:13.70 0.3 undecidable manual P 250 41.8248 107 -0.05 97
IV.VISG.HHZ. 2023-09-17T16:48:13.52 0.3 undecidable manual S 231 18.7701 131 -0.68 86
IV.SEI.HHZ. 2023-09-17T16:48:12.30 0.3 undecidable manual P 218 33.744 112 -0.28 94
IV.VISG.HHZ. 2023-09-17T16:48:10.10 0.3 undecidable manual P 231 18.7701 131 -0.49 92
IV.MTRZ.HHZ. 2023-09-17T16:48:10.45 0.3 undecidable manual P 277 15.4734 137 0.23 99
IV.IMOL.EHZ. 2023-09-17T16:48:09.74 0.3 undecidable manual P 54 12.1767 144 -0.17 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.VISG.HHE. ML:1.4 0.0001310714 0.1408 AML other m 2023-09-17T16:48:14.72
IV.VISG.HHN. ML:1.4 0.00015820575 0.1408 AML other m 2023-09-17T16:48:15.27
IV.IMOL.HNN. ML:1.9 0.00054 0.28 AML other m 2023-09-17T16:48:14.63
IV.IMOL.HNE. ML:1.9 0.0004975485000000001 0.2048 AML other m 2023-09-17T16:48:15.60
IV.MTRZ.HHE. ML:1.3 0.00013653694999999998 0.32 AML other m 2023-09-17T16:48:16.77
IV.MTRZ.HHN. ML:1.4 0.00015944155 0.3584 AML other m 2023-09-17T16:48:17.03
IV.SEI.HHN. ML:2.3 0.0008385 0.3 AML other m 2023-09-17T16:48:18.91
IV.VMGN.HHN. ML:1.3 0.00007230000000000001 1.26 AML other m 2023-09-17T16:48:19.87
IV.VMGN.HHE. ML:1.0 0.000028869684999999998 0.2176 AML other m 2023-09-17T16:48:19.98
IV.SEI.HHE. ML:1.7 0.000201 0.24 AML other m 2023-09-17T16:48:20.51
IV.FNVD.HHE. ML:1.3 0.000059941920000000004 0.2688 AML other m 2023-09-17T16:48:22.15
IV.FNVD.HHN. ML:1.0 0.00003183118 0.1408 AML other m 2023-09-17T16:48:21.25
IV.SFI.EHE. ML:1.2 0.0000401 1.54 AML other m 2023-09-17T16:48:22.99
IV.SFI.EHN. ML:1.1 0.00002812526 0.3968 AML other m 2023-09-17T16:48:26.22
IV.MOCL.EHE. ML:1.2 0.0000448 0.68 AML other m 2023-09-17T16:48:22.54
IV.MOCL.EHN. ML:1.2 0.000039312115 0.2048 AML other m 2023-09-17T16:48:23.42
IV.CRE.HHN. ML:1.2 0.000020869760000000002 0.3584 AML other m 2023-09-17T16:48:31.67
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