Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 26-03-2023 and time 12:06:37 (Italy) in region 8 km SW Santa Sofia (FC)

A magnitude ML 1.2 earthquake occured in region: 8 km SW Santa Sofia (FC), on

  • 26-03-2023 10:06:37 (UTC)
  • 26-03-2023 12:06:37 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.8840, 11.8580 at 7 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
Santa Sofia FC 8 4136 4136
Bagno di Romagna FC 10 6026 10162
Premilcuore FC 12 799 10961
Galeata FC 13 2516 13477
Pratovecchio Stia AR 15 5845 19322
Civitella di Romagna FC 15 3786 23108
Verghereto FC 15 1907 25015
Portico e San Benedetto FC 17 756 25771
Poppi AR 19 6160 31931
San Godenzo FI 20 1167 33098
Rocca San Casciano FC 20 1910 35008
Castel San Niccolò AR 20 2707 37715

Municipalities with at least 50000 inhabitants

An earthquake occurred to
41 Km SW of Forlì (117913 inhabitants)
42 Km SW of Cesena (96758 inhabitants)
45 Km S of Faenza (58541 inhabitants)
46 Km N of Arezzo (99543 inhabitants)
50 Km E of Firenze (382808 inhabitants)
54 Km S of Imola (69797 inhabitants)
56 Km E of Scandicci (50609 inhabitants)
60 Km W of Rimini (147750 inhabitants)
61 Km E of Prato (191150 inhabitants)
65 Km SW of Ravenna (159116 inhabitants)
76 Km E of Pistoia (90315 inhabitants)
76 Km NE of Siena (53903 inhabitants)
80 Km SE of Bologna (386663 inhabitants)
85 Km W of Pesaro (94582 inhabitants)
93 Km W of Fano (60888 inhabitants)
96 Km NW of Perugia (166134 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 1.2 2023-03-26
10:06:37		 43.8838 11.8585 7 2024-03-01
17:18:19		 Bollettino Sismico Italiano INGV 124301531
Reviewed
Rev100 		ML 1.4 2023-03-26
10:06:37		 43.884 11.8317 3 2023-03-26
10:16:03		 Sala Sismica INGV-Roma 115744221
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-03-26 10:06:37 ± 0.14
Latitude 43.8838 ± 0.0054
Longitude 11.8585 ± 0.0100
Depth (km) 7 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 124301531

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 780
Semi-minor axis of confidence ellipse (meter) 352
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 72
Circular confidence region, given by single value of horizontal uncertainty (meter) 780.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 177
Number of associated phases, regardless of their use for origin computation 14
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.27
Epicentral distance of station closest to the epicenter (degree) 0.02248
Epicentral distance of station farthest from the epicenter (degree) 0.39750
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitudes information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.3
Num. used stations 7
Type of magnitude ML
Reference to an origin 124301531
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2023-12-27 14:24:55

ML:1.4

Field Value
Value 1.4
Uncertainty 0.2
Num. used stations 4
Type of magnitude ML
Reference to an origin 115744221
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-03-26 10:16:03
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SEI.HHZ. 2023-03-26T10:06:52.29 0.3 undecidable manual S 296 44.1225 50 -0.18 67
IV.BRIS.HNN. 2023-03-26T10:06:51.35 0.6 undecidable manual S 349 38.5281 100 0.56 41
IV.CRE.HHZ. 2023-03-26T10:06:48.27 0.6 undecidable manual S 166 30.3474 102 0.26 45
IV.RUFI.EHZ. 2023-03-26T10:06:47.54 0.3 undecidable manual S 260 28.3494 103 0.19 69
IV.VMGN.HHN. 2023-03-26T10:06:47.26 0.6 undecidable manual S 287 27.1506 104 0.31 45
IV.LMD.HHZ. 2023-03-26T10:06:46.09 0.6 undecidable manual S 331 24.6531 105 0 48
IV.BRIS.HNN. 2023-03-26T10:06:45.57 0.3 undecidable manual P 349 38.5281 100 0.51 63
IV.SEI.HHZ. 2023-03-26T10:06:45.61 0.1 undecidable manual P 296 44.1225 50 -0.43 85
IV.CRE.HHZ. 2023-03-26T10:06:43.50 0.1 undecidable manual P 166 30.3474 102 0.04 95
IV.RUFI.EHZ. 2023-03-26T10:06:43.04 0.1 undecidable manual P 260 28.3494 103 -0.04 95
IV.LMD.HHZ. 2023-03-26T10:06:42.20 0.1 undecidable manual P 331 24.6531 105 -0.15 94
IV.VMGN.HHN. 2023-03-26T10:06:42.93 0.1 undecidable manual P 287 27.1506 104 0.09 94
IV.SFI.EHZ. 2023-03-26T10:06:39.28 0.1 undecidable manual S 338 2.4975 159 -0.41 92
IV.SFI.EHZ. 2023-03-26T10:06:38.65 0.1 undecidable manual P 338 2.4975 159 -0.01 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LMD.HHE. ML:1.3 0.000135 0.28 AML other m 2023-03-26T10:06:46.69
IV.LMD.HHN. ML:1.3 0.0001272 0.24 AML other m 2023-03-26T10:06:46.67
IV.SEI.HHN. ML:1.6 0.000129 0.18 AML other m 2023-03-26T10:06:52.84
IV.SEI.HHE. ML:1.4 0.0000729 0.24 AML other m 2023-03-26T10:06:53.04
IV.RUFI.EHN. ML:1.0 0.000054102849999999996 0.1408 AML other m 2023-03-26T10:06:47.67
IV.CRE.HHE. ML:0.6 0.000021765689999999997 0.4224 AML other m 2023-03-26T10:06:52.15
IV.CRE.HHN. ML:0.8 0.000034755214999999997 0.2368 AML other m 2023-03-26T10:06:49.11
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