Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.8 on date 30-10-2023 and time 09:22:02 (UTC) in region 3 km W Premilcuore (FC)

A magnitude ML 0.8 earthquake occured in region: 3 km W Premilcuore (FC), on

  • 30-10-2023 09:22:02 (UTC)
  • 30-10-2023 10:22:02 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.9830, 11.7340 at 10 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.

Hai sentito il terremoto? Clicca qui

Did you feel it? Fill in the questionnaire.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Premilcuore FC 3 799 799
Portico e San Benedetto FC 6 756 1555
Tredozio FC 11 1212 2767
San Godenzo FI 11 1167 3934
Rocca San Casciano FC 12 1910 5844
Marradi FI 14 3139 8983
Galeata FC 14 2516 11499
Santa Sofia FC 15 4136 15635
Civitella di Romagna FC 17 3786 19421
Londa FI 19 1840 21261
Dicomano FI 20 5515 26776
Dovadola FC 20 1653 28429
Modigliana FC 20 4560 32989

Municipalities with at least 50000 inhabitants

An earthquake occurred to
36 Km SW of Faenza (58541 inhabitants)
36 Km SW of Forlì (117913 inhabitants)
41 Km S of Imola (69797 inhabitants)
44 Km W of Cesena (96758 inhabitants)
45 Km NE of Firenze (382808 inhabitants)
51 Km E of Scandicci (50609 inhabitants)
52 Km E of Prato (191150 inhabitants)
59 Km N of Arezzo (99543 inhabitants)
61 Km SW of Ravenna (159116 inhabitants)
65 Km SE of Bologna (386663 inhabitants)
66 Km E of Pistoia (90315 inhabitants)
67 Km W of Rimini (147750 inhabitants)
81 Km NE of Siena (53903 inhabitants)
95 Km W of Pesaro (94582 inhabitants)
95 Km S of Ferrara (133155 inhabitants)
98 Km SE of Modena (184973 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 2023-10-30
09:22:02		 43.9828 11.7343 10 2023-10-30
09:34:55		 Sala Sismica INGV-Roma 122577821
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-10-30 09:22:02 ± 0.16
Latitude 43.9828 ± 0.0162
Longitude 11.7343 ± 0.0075
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 122577821

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1733
Semi-minor axis of confidence ellipse (meter) 535
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 180
Circular confidence region, given by single value of horizontal uncertainty (meter) 1730.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 209
Number of associated phases, regardless of their use for origin computation 23
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.27969
Number of stations at which the event was observed 18
Number of stations from which data was used for origin computation 5
Magnitude information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 122577821
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-10-30 09:34:55
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
AC.SRN.HHZ. 2023-10-30T09:24:10.73 3.0 negative manual Pg 21.790001 0
IV.AIO.HHZ. 2023-10-30T09:23:53.16 3.0 undecidable manual Pg 14.48 0
IV.GATE.HHZ. 2023-10-30T09:23:52.31 3.0 undecidable manual Sg 14.84 0
IV.CROCE.HNZ. 2023-10-30T09:23:48.33 3.0 undecidable manual Pn -2.75 0
IV.SALB.HHZ. 2023-10-30T09:23:42.99 3.0 negative manual Pg 21.459999 0
RD.ORIF.BHZ. 2023-10-30T09:23:21.14 3.0 negative manual Pg 17.42 0
IV.PSB1.HHZ. 2023-10-30T09:23:03.41 3.0 negative manual Pn 6.3 0
OT.OT14.EHZ. 2023-10-30T09:23:02.01 3.0 positive manual Pn 3.82 0
IV.RIBO.EHZ.01 2023-10-30T09:22:47.16 3.0 undecidable manual S 3.34 0
IV.ASSB.HHZ. 2023-10-30T09:22:41.42 3.0 undecidable manual S -1.93 0
IV.FRON.EHZ. 2023-10-30T09:22:36.66 3.0 undecidable manual S 2.01 0
IV.ZOVE.EHZ. 2023-10-30T09:22:21.57 3.0 undecidable manual Pn -0.68 0
IV.NARO.HHZ. 2023-10-30T09:22:18.17 3.0 positive manual P 1.29 0
IV.SEI.HHZ. 2023-10-30T09:22:14.09 0.6 undecidable manual S 285 31.0467 50 0.24 46
IV.RUFI.EHZ. 2023-10-30T09:22:11.76 0.6 undecidable manual S 228 24.0537 112 -0.01 49
IV.VMGN.HHZ. 2023-10-30T09:22:09.33 0.6 undecidable manual S 259 16.3725 120 -0.03 50
IV.RINC.EHZ. 2023-10-30T09:22:09.08 0.6 undecidable manual S 224 14.7741 123 0.2 48
IV.SEI.HHZ. 2023-10-30T09:22:08.81 0.6 negative manual P 285 31.0467 50 -0.36 45
IV.SFI.EHZ. 2023-10-30T09:22:08.00 0.3 undecidable manual S 134 12.4764 127 -0.23 72
IV.RUFI.EHZ. 2023-10-30T09:22:07.76 0.3 positive manual P 228 24.0537 112 -0.21 71
IV.VMGN.HHZ. 2023-10-30T09:22:06.56 0.6 positive manual P 259 16.3725 120 -0.02 50
IV.RINC.EHZ. 2023-10-30T09:22:06.32 0.1 undecidable manual P 224 14.7741 123 0.02 100
IV.SFI.EHZ. 2023-10-30T09:22:06.22 0.1 undecidable manual P 134 12.4764 127 0.29 95
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SFI.EHE. ML:0.4 0.00002424216 0.9024 AML other m 2023-10-30T09:22:14.80
IV.SFI.EHN. ML:0.6 0.000040116395 1.0368 AML other m 2023-10-30T09:22:14.02
IV.SFI.HNE. ML:1.0 0.0001252659 1.2032 AML other m 2023-10-30T09:22:15.14
IV.SFI.HNN. ML:1.0 0.00010367833999999999 0.7232 AML other m 2023-10-30T09:22:16.64
IV.VMGN.HHE. ML:0.0 0.000009682969865 44.5568 AML other m 2023-10-30T09:22:06.19
IV.VMGN.HHN. ML:0.4 0.000018456239999999997 1.1776 AML other m 2023-10-30T09:22:18.61
IV.RUFI.EHE. ML:0.4 0.000015277356 0.7424 AML other m 2023-10-30T09:22:10.79
IV.RUFI.EHN. ML:1.0 0.00005517381 2.3424 AML other m 2023-10-30T09:22:17.55
IV.SEI.HHE. ML:0.8 0.000029652365 0.3008 AML other m 2023-10-30T09:22:17.17
IV.SEI.HHN. ML:1.1 0.00005831209500000001 0.2432 AML other m 2023-10-30T09:22:14.40
IV.NARO.HHE. ML:1.2 0.00001854801 0.6144 AML other m 2023-10-30T09:22:52.95
IV.NARO.HHN. ML:1.0 0.0000150883245 0.2752 AML other m 2023-10-30T09:22:53.85
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