Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 08-01-2023 and time 11:26:56 (Italy) in region 6 km E Brisighella (RA)

A magnitude ML 1.8 earthquake occured in region: 6 km E Brisighella (RA), on

  • 08-01-2023 10:26:56 (UTC)
  • 08-01-2023 11:26:56 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.2200, 11.8510 at 26 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
Brisighella RA 6 7639 7639
Faenza RA 8 58541 66180
Modigliana FC 8 4560 70740
Castrocaro Terme e Terra del Sole FC 9 6426 77166
Dovadola FC 11 1653 78819
Castel Bolognese RA 12 9554 88373
Riolo Terme RA 12 5720 94093
Forlì FC 15 117913 212006
Solarolo RA 16 4488 216494
Predappio FC 17 6346 222840
Rocca San Casciano FC 18 1910 224750
Tredozio FC 18 1212 225962
Casola Valsenio RA 18 2617 228579
Imola BO 18 69797 298376
Bagnara di Romagna RA 19 2429 300805
Meldola FC 20 9970 310775
Cotignola RA 20 7474 318249

Municipalities with at least 50000 inhabitants

An earthquake occurred to
8 Km SW of Faenza (58541 inhabitants)
15 Km W of Forlì (117913 inhabitants)
18 Km SE of Imola (69797 inhabitants)
33 Km W of Cesena (96758 inhabitants)
36 Km SW of Ravenna (159116 inhabitants)
51 Km SE of Bologna (386663 inhabitants)
60 Km W of Rimini (147750 inhabitants)
69 Km NE of Firenze (382808 inhabitants)
71 Km S of Ferrara (133155 inhabitants)
71 Km NE of Prato (191150 inhabitants)
74 Km NE of Scandicci (50609 inhabitants)
81 Km E of Pistoia (90315 inhabitants)
84 Km N of Arezzo (99543 inhabitants)
87 Km SE of Modena (184973 inhabitants)
92 Km W of Pesaro (94582 inhabitants)
95 Km S of Rovigo (51867 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
Bulletin
Rev1000 		ML 1.8 2023-01-08
10:26:56		 44.2203 11.8507 26 2024-03-01
17:17:54		 Bollettino Sismico Italiano INGV 114321441
Reviewed
Rev100 		ML 1.8 2023-01-08
10:26:56		 44.228 11.8368 29 2023-01-08
10:46:07		 Sala Sismica INGV-Roma 113393701
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-01-08 10:26:56 ± 0.26
Latitude 44.2203 ± 0.0108
Longitude 11.8507 ± 0.0151
Depth (km) 26 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 114321441

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1115
Semi-minor axis of confidence ellipse (meter) 829
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 118
Circular confidence region, given by single value of horizontal uncertainty (meter) 1110.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 63
Number of associated phases, regardless of their use for origin computation 23
Number of defining phases 22
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.41
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.84356
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 13
Magnitudes information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 114321441
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2023-07-18 10:34:49

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 113393701
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-01-08 10:46:07
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
GU.GRAM.HHZ. 2023-01-08T10:27:43.27 3.0 undecidable manual S 0.18 0
IV.PIEI.HHZ. 2023-01-08T10:27:13.11 0.6 undecidable manual P 144 93.6396 101 0.47 40
IV.SEI.HHZ. 2023-01-08T10:27:12.36 0.6 undecidable manual S 245 43.3233 115 0.86 37
IV.NARO.HHZ. 2023-01-08T10:27:12.09 0.3 undecidable manual P 139 89.3439 101 0.1 65
IV.VISG.HHZ. 2023-01-08T10:27:09.40 0.6 undecidable manual S 264 33.2445 122 0.25 46
IV.SFI.EHZ. 2023-01-08T10:27:09.79 0.3 undecidable manual S 180 35.0427 121 0.25 70
IV.CPGN.EHZ. 2023-01-08T10:27:08.42 0.3 undecidable manual P 141 59.6958 107 0.86 55
Y1.T1756.HNZ. 2023-01-08T10:27:07.73 0.6 undecidable manual S 132 26.8509 129 -0.01 49
IV.BRSN.HNE. 2023-01-08T10:27:07.28 0.6 undecidable manual S 69 19.5693 139 0.94 38
IV.IMOL.EHZ. 2023-01-08T10:27:07.25 0.6 undecidable manual S 331 17.6712 142 1.23 32
IV.LMD.HHZ. 2023-01-08T10:27:06.46 0.6 undecidable manual S 216 19.5693 139 0.12 49
IV.SEI.HHZ. 2023-01-08T10:27:05.20 0.1 undecidable manual P 245 43.3233 115 0.01 96
IT.FAZ.HNZ. 2023-01-08T10:27:04.95 0.3 undecidable manual S 20 9.1797 158 0.06 75
IV.BRIS.HHZ. 2023-01-08T10:27:04.48 0.3 undecidable manual S 274 6.6933 164 -0.19 74
IV.MTRZ.HNN. 2023-01-08T10:27:04.67 0.3 undecidable manual P 287 35.3424 120 0.56 64
IV.VISG.HHZ. 2023-01-08T10:27:03.59 0.1 undecidable manual P 264 33.2445 122 -0.25 93
IV.SFI.EHZ. 2023-01-08T10:27:03.66 0.1 undecidable manual P 180 35.0427 121 -0.4 89
Y1.T1756.HNZ. 2023-01-08T10:27:02.44 1.0 undecidable manual P 132 26.8509 129 -0.58 21
IV.LMD.HHZ. 2023-01-08T10:27:01.67 0.1 undecidable manual P 216 19.5693 139 -0.54 88
IV.IMOL.EHZ. 2023-01-08T10:27:01.99 0.1 positive manual P 331 17.6712 142 -0.04 100
IV.BRSN.HNE. 2023-01-08T10:27:01.80 0.6 undecidable manual P 69 19.5693 139 -0.42 46
IT.FAZ.HNZ. 2023-01-08T10:27:00.82 0.1 undecidable manual P 20 9.1797 158 -0.56 90
IV.BRIS.HHZ. 2023-01-08T10:27:00.70 0.1 negative manual P 274 6.6933 164 -0.55 90
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.BRIS.HHN. ML:1.8 0.0004185 0.38 AML other m 2023-01-08T10:27:04.84
IV.BRIS.HNN. ML:2.2 0.0010075000000000001 0.36 AML other m 2023-01-08T10:27:04.84
IV.BRIS.HNE. ML:2.0 0.0006965 0.28 AML other m 2023-01-08T10:27:04.74
IV.BRIS.HHE. ML:1.6 0.000249 0.28 AML other m 2023-01-08T10:27:04.74
IV.LMD.HHN. ML:2.0 0.0004935 0.22 AML other m 2023-01-08T10:27:06.63
IV.LMD.HHE. ML:1.9 0.00040100000000000004 0.2 AML other m 2023-01-08T10:27:06.54
IV.SFI.EHE. ML:1.5 0.00010755000000000001 0.28 AML other m 2023-01-08T10:27:11.00
IV.SFI.EHN. ML:1.4 0.00008405 0.68 AML other m 2023-01-08T10:27:11.45
IV.SEI.HHE. ML:1.5 0.00008835 1.5 AML other m 2023-01-08T10:27:14.19
IV.SEI.HHN. ML:1.8 0.00015625 0.54 AML other m 2023-01-08T10:27:15.81
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