Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 29-07-2022 and time 01:23:35 (Italy) in region 4 km SE Rocca San Casciano (FC)

A magnitude ML 1.1 earthquake occured in region: 4 km SE Rocca San Casciano (FC), on

  • 28-07-2022 23:23:35 (UTC)
  • 29-07-2022 01:23:35 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.0290, 11.8600 at 9 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
Rocca San Casciano FC 4 1910 1910
Galeata FC 5 2516 4426
Portico e San Benedetto FC 6 756 5182
Civitella di Romagna FC 7 3786 8968
Premilcuore FC 9 799 9767
Santa Sofia FC 10 4136 13903
Dovadola FC 11 1653 15556
Tredozio FC 11 1212 16768
Predappio FC 13 6346 23114
Modigliana FC 15 4560 27674
Castrocaro Terme e Terra del Sole FC 18 6426 34100
Meldola FC 20 9970 44070

Municipalities with at least 50000 inhabitants

An earthquake occurred to
26 Km SW of Forlì (117913 inhabitants)
29 Km S of Faenza (58541 inhabitants)
33 Km W of Cesena (96758 inhabitants)
38 Km SE of Imola (69797 inhabitants)
51 Km SW of Ravenna (159116 inhabitants)
56 Km NE of Firenze (382808 inhabitants)
57 Km W of Rimini (147750 inhabitants)
62 Km E of Scandicci (50609 inhabitants)
63 Km N of Arezzo (99543 inhabitants)
63 Km E of Prato (191150 inhabitants)
66 Km SE of Bologna (386663 inhabitants)
76 Km E of Pistoia (90315 inhabitants)
85 Km W of Pesaro (94582 inhabitants)
90 Km NE of Siena (53903 inhabitants)
92 Km S of Ferrara (133155 inhabitants)
95 Km W of Fano (60888 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 1.1 2022-07-28
23:23:35		 44.0293 11.8597 9 2023-01-31
19:03:47		 Bollettino Sismico Italiano INGV 109962791
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2022-07-28 23:23:35 ± 0.18
Latitude 44.0293 ± 0.0054
Longitude 11.8597 ± 0.0150
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 109962791

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1237
Semi-minor axis of confidence ellipse (meter) 232
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 75
Circular confidence region, given by single value of horizontal uncertainty (meter) 1240.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 163
Number of associated phases, regardless of their use for origin computation 12
Number of defining phases 12
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) 0.11961
Epicentral distance of station farthest from the epicenter (degree) 0.46855
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.3
Num. used stations 8
Type of magnitude ML
Reference to an origin 109962791
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-09-21 13:21:26
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.VISG.HHZ. 2022-07-28T23:23:49.11 0.3 undecidable manual S 298 38.2284 50 0.36 68
IV.RUFI.EHE. 2022-07-28T23:23:48.16 0.1 undecidable manual S 233 35.1426 50 0.24 93
IV.PARC.HHZ. 2022-07-28T23:23:45.33 1.0 undecidable manual P 144 52.0035 50 -0.02 24
IV.CRE.HHZ. 2022-07-28T23:23:44.59 1.0 undecidable manual P 171 46.1205 50 0.15 23
IV.BRIS.HHZ. 2022-07-28T23:23:44.65 0.1 undecidable manual S 341 22.8549 112 0.42 91
IV.RUFI.EHE. 2022-07-28T23:23:42.42 0.1 positive manual P 233 35.1426 50 -0.32 91
IV.VISG.HHZ. 2022-07-28T23:23:42.83 0.3 undecidable manual P 298 38.2284 50 -0.39 67
IV.SFI.EHZ. 2022-07-28T23:23:41.73 0.1 undecidable manual S 184 13.875 124 0.28 96
IV.LMD.HHZ. 2022-07-28T23:23:41.20 0.1 undecidable manual S 294 13.2756 125 -0.07 100
IV.BRIS.HHZ. 2022-07-28T23:23:40.51 0.1 undecidable manual P 341 22.8549 112 -0.1 98
IV.LMD.HHZ. 2022-07-28T23:23:38.56 0.1 undecidable manual P 294 13.2756 125 -0.34 94
IV.SFI.EHZ. 2022-07-28T23:23:38.94 0.1 positive manual P 184 13.875 124 -0.07 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LMD.HHN. ML:1.3 0.00023899999999999998 0.14 AML other m 2022-07-28T23:23:41.61
IV.SFI.EHE. ML:1.4 0.000282 0.16 AML other m 2022-07-28T23:23:41.93
IV.LMD.HHE. ML:1.3 0.00024249999999999999 0.52 AML other m 2022-07-28T23:23:41.65
IV.SFI.EHN. ML:1.4 0.00025 1.64 AML other m 2022-07-28T23:23:42.93
IV.BRIS.HHE. ML:1.0 0.00006095 0.26 AML other m 2022-07-28T23:23:44.94
IV.BRIS.HHN. ML:1.0 0.00006214999999999999 1.56 AML other m 2022-07-28T23:23:44.97
IV.CRE.HHN. ML:0.8 0.000021649999999999998 0.44 AML other m 2022-07-28T23:23:51.88
IV.CRE.HHE. ML:0.8 0.000019699999999999998 0.54 AML other m 2022-07-28T23:23:52.13
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