Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.6 on date 18-02-2023 and time 14:00:13 (Italy) in region 2 km SE Palazzuolo sul Senio (FI)

A magnitude ML 0.6 earthquake occured in region: 2 km SE Palazzuolo sul Senio (FI), on

  • 18-02-2023 13:00:13 (UTC)
  • 18-02-2023 14:00:13 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.0940, 11.5630 at 10 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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
Palazzuolo sul Senio FI 2 1154 1154
Marradi FI 5 3139 4293
Castel del Rio BO 14 1246 5539
Tredozio FC 15 1212 6751
Firenzuola FI 15 4726 11477
Casola Valsenio RA 15 2617 14094
Fontanelice BO 18 1943 16037
Portico e San Benedetto FC 19 756 16793
San Godenzo FI 19 1167 17960
Vicchio FI 19 8044 26004
Modigliana FC 20 4560 30564

Municipalities with at least 50000 inhabitants

An earthquake occurred to
31 Km SW of Imola (69797 inhabitants)
33 Km SW of Faenza (58541 inhabitants)
41 Km W of Forlì (117913 inhabitants)
44 Km NE of Firenze (382808 inhabitants)
44 Km NE of Prato (191150 inhabitants)
48 Km SE of Bologna (386663 inhabitants)
48 Km NE of Scandicci (50609 inhabitants)
55 Km W of Cesena (96758 inhabitants)
55 Km E of Pistoia (90315 inhabitants)
62 Km SW of Ravenna (159116 inhabitants)
74 Km NW of Arezzo (99543 inhabitants)
80 Km SE of Modena (184973 inhabitants)
80 Km W of Rimini (147750 inhabitants)
83 Km S of Ferrara (133155 inhabitants)
88 Km N of Siena (53903 inhabitants)
89 Km E of Lucca (89046 inhabitants)
94 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
Bulletin
Rev1000 		ML 0.6 2023-02-18
13:00:13		 44.0943 11.5633 10 2024-03-01
17:18:17		 Bollettino Sismico Italiano INGV 122740491
Reviewed
Rev100 		ML 0.5 2023-02-18
13:00:13		 44.0927 11.5638 10 2023-02-18
13:25:00		 Sala Sismica INGV-Roma 114548281
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-02-18 13:00:13 ± 0.08
Latitude 44.0943 ± 0.0045
Longitude 11.5633 ± 0.0050
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 122740491

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 552
Semi-minor axis of confidence ellipse (meter) 174
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 326
Circular confidence region, given by single value of horizontal uncertainty (meter) 550.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 153
Number of associated phases, regardless of their use for origin computation 28
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.17
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.27879
Number of stations at which the event was observed 21
Number of stations from which data was used for origin computation 7
Magnitudes information

ML:0.6

Field Value
Value 0.6
Uncertainty 0.3
Num. used stations 9
Type of magnitude ML
Reference to an origin 122740491
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2023-11-03 11:31:10

ML:0.5

Field Value
Value 0.5
Uncertainty 0.3
Num. used stations 9
Type of magnitude ML
Reference to an origin 114548281
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-02-18 13:25:00
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.PZUN.HHZ. 2023-02-18T13:01:44.71 3.0 undecidable manual Sn -4.21 0
GU.RORO.HHZ. 2023-02-18T13:01:30.10 3.0 undecidable manual Sn 5.53 0
IV.PAOL.HHZ. 2023-02-18T13:01:28.16 3.0 undecidable manual Sg 1.77 0
IV.MBFT.HHZ. 2023-02-18T13:01:25.74 3.0 undecidable manual Pn 4.19 0
IV.SPS2.HHZ. 2023-02-18T13:01:21.78 3.0 negative manual Pn 3.19 0
MN.TRI.HHZ. 2023-02-18T13:01:21.83 3.0 undecidable manual Sg 2.6 0
IV.NOCI.HHZ. 2023-02-18T13:01:17.48 3.0 undecidable manual Pg 7.66 0
IV.MGR.HHZ. 2023-02-18T13:01:13.87 3.0 undecidable manual Pg 9.56 0
IV.GIUL.HHZ. 2023-02-18T13:01:04.26 3.0 undecidable manual Sg 2.14 0
IV.SBPO.HNZ. 2023-02-18T13:00:30.87 3.0 negative manual Pn -1.99 0
IV.CELB.HHZ. 2023-02-18T13:00:28.93 3.0 undecidable manual P 2.57 0
IV.SFI.EHZ. 2023-02-18T13:00:24.69 0.6 undecidable manual S 133 30.9468 50 0.17 48
IV.RUFI.EHZ. 2023-02-18T13:00:23.82 0.3 undecidable manual S 189 28.749 50 -0.14 72
IV.BRIS.HHZ. 2023-02-18T13:00:22.19 0.3 undecidable manual S 48 21.6672 115 0.33 70
IV.BOSL.HHZ. 2023-02-18T13:00:22.63 0.3 undecidable manual S 220 23.5542 113 0.16 72
IV.SEI.HHZ. 2023-02-18T13:00:20.40 0.6 undecidable manual S 255 16.872 121 0 50
IV.VMGN.HHE. 2023-02-18T13:00:20.19 0.3 undecidable manual S 189 15.6732 122 0.15 74
IV.SFI.EHZ. 2023-02-18T13:00:20.02 0.3 undecidable manual P 133 30.9468 50 0.12 72
IV.MCIV.CHZ. 2023-02-18T13:00:19.65 3.0 undecidable manual S -2.92 0
IV.RUFI.EHZ. 2023-02-18T13:00:19.40 0.6 undecidable manual P 189 28.749 50 -0.17 48
IV.LMD.HHZ. 2023-02-18T13:00:18.64 0.3 undecidable manual S 99 11.5773 131 -0.26 73
IV.BRIS.HHZ. 2023-02-18T13:00:18.35 0.1 undecidable manual P 48 21.6672 115 -0.01 100
IV.BOSL.HHZ. 2023-02-18T13:00:18.73 0.1 undecidable manual P 220 23.5542 113 0.02 99
IV.VMGN.HHE. 2023-02-18T13:00:17.43 0.1 undecidable manual P 189 15.6732 122 0.12 99
IV.SEI.HHZ. 2023-02-18T13:00:17.33 0.1 undecidable manual P 255 16.872 121 -0.19 97
IV.LMD.HHZ. 2023-02-18T13:00:16.44 0.1 undecidable manual P 99 11.5773 131 -0.21 98
IV.SSFR.HHZ. 2023-02-18T13:00:12.21 3.0 undecidable manual P -0.77 0
IV.CSNT.HHZ. 2023-02-18T13:00:10.67 3.0 negative manual P -0.08 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LMD.HHN. ML:0.6 0.000052253849999999994 0.0832 AML other m 2023-02-18T13:00:18.89
IV.LMD.HHE. ML:0.6 0.000049204525 0.064 AML other m 2023-02-18T13:00:18.92
IV.SEI.HHN. ML:1.0 0.000092342675 0.1408 AML other m 2023-02-18T13:00:20.65
IV.SEI.HHE. ML:0.7 0.000044298304999999996 0.2048 AML other m 2023-02-18T13:00:21.24
IV.BRIS.HHE. ML:0.6 0.0000235 0.3 AML other m 2023-02-18T13:00:22.60
IV.BRIS.HHN. ML:0.6 0.00003075 1.64 AML other m 2023-02-18T13:00:22.86
IV.RUFI.EHE. ML:0.3 0.000009713110149999998 0.224 AML other m 2023-02-18T13:00:24.56
IV.SFI.EHE. ML:0.0 0.000006593323 0.1408 AML other m 2023-02-18T13:00:25.49
IV.SFI.EHN. ML:0.3 0.000009152661 0.0768 AML other m 2023-02-18T13:00:25.95
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