Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.9 on date 03-09-2021 and time 05:36:19 (Italy) in region 1 km SW Premilcuore (FC)

A magnitude ML 1.9 earthquake occured in region: 1 km SW Premilcuore (FC), on

  • 03-09-2021 03:36:19 (UTC)
  • 03-09-2021 05:36:19 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.9660, 11.7690 at 6 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
Premilcuore FC 1 799 799
Portico e San Benedetto FC 7 756 1555
Santa Sofia FC 11 4136 5691
Galeata FC 12 2516 8207
Rocca San Casciano FC 12 1910 10117
San Godenzo FI 13 1167 11284
Tredozio FC 13 1212 12496
Civitella di Romagna FC 14 3786 16282
Marradi FI 18 3139 19421
Londa FI 20 1840 21261
Pratovecchio Stia AR 20 5845 27106
Dovadola FC 20 1653 28759

Municipalities with at least 50000 inhabitants

An earthquake occurred to
36 Km SW of Forlì (117913 inhabitants)
37 Km S of Faenza (58541 inhabitants)
42 Km W of Cesena (96758 inhabitants)
43 Km S of Imola (69797 inhabitants)
46 Km E of Firenze (382808 inhabitants)
52 Km E of Scandicci (50609 inhabitants)
55 Km E of Prato (191150 inhabitants)
56 Km N of Arezzo (99543 inhabitants)
61 Km SW of Ravenna (159116 inhabitants)
65 Km W of Rimini (147750 inhabitants)
68 Km SE of Bologna (386663 inhabitants)
68 Km E of Pistoia (90315 inhabitants)
80 Km NE of Siena (53903 inhabitants)
92 Km W of Pesaro (94582 inhabitants)
98 Km S of Ferrara (133155 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 1.9 2021-09-03
03:36:19		 43.9658 11.7688 6 2022-03-30
13:04:05		 Bollettino Sismico Italiano INGV 95376541
Reviewed
Rev100 		ML 1.9 2021-09-03
03:36:19		 43.9775 11.7733 9 2021-09-03
03:44:28		 Sala Sismica INGV-Roma 94982081
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-03 03:36:19 ± 0.09
Latitude 43.9658 ± 0.0045
Longitude 11.7688 ± 0.0062
Depth (km) 6 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 95376541

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 589
Semi-minor axis of confidence ellipse (meter) 193
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 229
Circular confidence region, given by single value of horizontal uncertainty (meter) 590.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 82
Number of associated phases, regardless of their use for origin computation 40
Number of defining phases 37
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.37
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.96767
Number of stations at which the event was observed 26
Number of stations from which data was used for origin computation 23
Magnitudes information

ML:1.9

Field Value
Value 1.9
Uncertainty 0.3
Num. used stations 42
Type of magnitude ML
Reference to an origin 94982081
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-03 03:44:28

ML:1.9

Field Value
Value 1.9
Uncertainty 0.3
Num. used stations 42
Type of magnitude ML
Reference to an origin 95376541
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-01-04 11:04:24
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CADC.EHZ. 2021-09-03T03:37:18.68 3.0 undecidable manual Sg 1.35 0
GU.CANO.HHZ. 2021-09-03T03:37:01.61 3.0 undecidable manual Pn 0.69 0
IV.VENL.EHZ. 2021-09-03T03:36:47.75 3.0 positive manual P 1.06 0
IV.CRMI.HHZ. 2021-09-03T03:36:40.74 0.6 undecidable manual S 254 65.8896 50 0.41 44
IV.ARVD.HHZ. 2021-09-03T03:36:38.98 0.6 undecidable manual P 118 107.4147 50 1.2 29
IV.FNVD.HHZ. 2021-09-03T03:36:38.04 0.3 undecidable manual S 294 56.0994 50 0.31 69
IV.SSP9.EHZ. 2021-09-03T03:36:36.76 0.6 undecidable manual S 146 52.3032 50 0.06 49
IV.IMOL.EHZ. 2021-09-03T03:36:36.11 0.3 undecidable manual S 357 43.7229 50 1.7 37
IV.PARC.HHZ. 2021-09-03T03:36:36.38 0.6 undecidable manual S 133 51.5151 50 -0.11 48
IV.MOCL.EHZ. 2021-09-03T03:36:35.21 0.3 undecidable manual S 275 47.1195 50 -0.11 73
IV.ATVO.HHZ. 2021-09-03T03:36:33.74 0.3 undecidable manual P 141 82.5507 50 -0.21 67
IV.CRE.HHZ. 2021-09-03T03:36:33.53 0.6 undecidable manual S 159 41.2254 98 -0.08 50
IV.NARO.HHZ. 2021-09-03T03:36:32.46 0.3 undecidable manual P 121 75.9684 50 -0.49 64
IV.CAFI.HHZ. 2021-09-03T03:36:32.09 0.3 undecidable manual P 167 72.372 50 -0.3 67
IV.VISG.HHZ. 2021-09-03T03:36:31.58 0.6 undecidable manual S 313 36.3414 99 -0.38 47
IV.PE3.EHZ. 2021-09-03T03:36:31.44 0.1 undecidable manual P 117 65.49 50 0.12 94
IV.APEC.HHZ. 2021-09-03T03:36:31.85 0.6 undecidable manual P 131 68.9754 50 -0.02 48
IV.OSSC.HHZ. 2021-09-03T03:36:31.08 0.1 undecidable manual P 221 64.491 50 -0.1 95
IV.SEI.HHZ. 2021-09-03T03:36:31.25 0.3 undecidable manual S 287 34.1436 100 0.04 76
IV.CRMI.HHZ. 2021-09-03T03:36:31.46 0.1 undecidable manual P 254 65.8896 50 0.08 95
IV.BOSL.HHZ. 2021-09-03T03:36:30.85 0.6 undecidable manual S 263 31.746 101 0.47 46
IV.FNVD.HHZ. 2021-09-03T03:36:29.58 0.1 undecidable manual P 294 56.0994 50 -0.3 92
IV.BRIS.HHZ. 2021-09-03T03:36:29.55 0.1 undecidable manual S 360 28.6491 102 0.21 99
IV.SSP9.EHZ. 2021-09-03T03:36:28.75 0.3 undecidable manual P 146 52.3032 50 -0.54 66
IV.BRSN.EHZ. 2021-09-03T03:36:28.08 0.3 undecidable manual P 35 43.1235 50 0.2 72
IV.MTRZ.HNN. 2021-09-03T03:36:28.77 0.3 undecidable manual P 325 47.2194 50 0.26 71
IV.RUFI.EHZ. 2021-09-03T03:36:28.86 0.6 undecidable manual S 236 25.1526 104 0.73 43
IV.IMOL.EHZ. 2021-09-03T03:36:28.44 0.1 undecidable manual P 357 43.7229 50 0.47 91
IV.PARC.HHZ. 2021-09-03T03:36:28.66 0.1 undecidable manual P 133 51.5151 50 -0.51 89
IV.MOCL.EHZ. 2021-09-03T03:36:28.19 0.1 undecidable manual P 275 47.1195 50 -0.31 94
IV.CRE.HHZ. 2021-09-03T03:36:27.07 0.1 positive manual P 159 41.2254 98 -0.44 92
IV.SEI.HHZ. 2021-09-03T03:36:25.81 0.1 positive manual P 287 34.1436 100 -0.31 96
IV.VISG.HHZ. 2021-09-03T03:36:25.93 0.1 undecidable manual P 313 36.3414 99 -0.62 87
IV.BOSL.HHZ. 2021-09-03T03:36:25.76 0.1 positive manual P 263 31.746 101 0.12 100
IV.BRIS.HHZ. 2021-09-03T03:36:24.84 0.1 positive manual P 360 28.6491 102 -0.2 99
IV.RUFI.EHZ. 2021-09-03T03:36:24.67 0.1 positive manual P 236 25.1526 104 0.33 97
IV.LMD.HHZ. 2021-09-03T03:36:23.74 0.6 undecidable manual S 338 13.2756 114 -0.5 48
IV.SFI.HNZ. 2021-09-03T03:36:23.73 0.3 undecidable manual S 137 9.1797 123 0.74 65
IV.SFI.HNZ. 2021-09-03T03:36:21.86 0.1 positive manual P 137 9.1797 123 0.49 96
IV.LMD.HHZ. 2021-09-03T03:36:21.74 0.1 positive manual P 338 13.2756 114 -0.35 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LMD.HHE. ML:2.3 0.00231 1.62 AML other m 2021-09-03T03:36:23.93
IV.SFI.HNN. ML:2.2 0.0025999999999999994 1.56 AML other m 2021-09-03T03:36:23.95
IV.SFI.EHN. ML:2.2 0.0025800000000000003 1.54 AML other m 2021-09-03T03:36:23.95
IV.SFI.HNE. ML:2.2 0.0026100000000000003 1.92 AML other m 2021-09-03T03:36:24.00
IV.LMD.HHN. ML:2.2 0.0017749999999999999 0.28 AML other m 2021-09-03T03:36:24.01
IV.SFI.EHE. ML:2.2 0.00267 0.08 AML other m 2021-09-03T03:36:24.01
IV.RUFI.EHE. ML:1.6 0.00027400000000000005 0.52 AML other m 2021-09-03T03:36:29.48
IV.RUFI.EHN. ML:1.7 0.000297 0.3 AML other m 2021-09-03T03:36:29.36
IV.BRIS.HHE. ML:2.6 0.00198 0.34 AML other m 2021-09-03T03:36:29.75
IV.BRIS.HHN. ML:2.5 0.001695 0.78 AML other m 2021-09-03T03:36:30.87
IV.BOSL.HHN. ML:1.9 0.00033850000000000004 0.38 AML other m 2021-09-03T03:36:31.63
IV.SEI.HHE. ML:2.4 0.001018 0.26 AML other m 2021-09-03T03:36:31.82
IV.SEI.HHN. ML:2.5 0.0014399999999999999 0.38 AML other m 2021-09-03T03:36:31.84
IV.BOSL.HHE. ML:1.6 0.000209 0.62 AML other m 2021-09-03T03:36:31.56
IV.VISG.HHE. ML:1.3 0.0000863 0.12 AML other m 2021-09-03T03:36:32.89
IV.VISG.HHN. ML:1.6 0.00016999999999999999 0.68 AML other m 2021-09-03T03:36:33.22
IV.CRE.HHN. ML:2.2 0.000579 1.64 AML other m 2021-09-03T03:36:34.14
IV.CRE.HHE. ML:1.7 0.00016900000000000002 0.26 AML other m 2021-09-03T03:36:34.71
IV.MOCL.EHN. ML:1.8 0.00019600000000000002 1.2 AML other m 2021-09-03T03:36:35.36
IV.MOCL.EHE. ML:1.8 0.0001815 0.64 AML other m 2021-09-03T03:36:36.50
IV.IMOL.HNE. ML:2.4 0.0008185 0.3 AML other m 2021-09-03T03:36:36.88
IV.IMOL.HNN. ML:2.5 0.0010500000000000002 0.82 AML other m 2021-09-03T03:36:37.76
IV.BRSN.HNN. ML:2.2 0.0005005 0.62 AML other m 2021-09-03T03:36:39.39
IV.PARC.HHE. ML:1.3 0.0000562 0.98 AML other m 2021-09-03T03:36:40.33
IV.PARC.HHN. ML:1.5 0.0000856 0.6 AML other m 2021-09-03T03:36:41.18
IV.FNVD.HHE. ML:1.8 0.00013550000000000001 0.76 AML other m 2021-09-03T03:36:41.19
IV.CRMI.HHE. ML:1.5 0.0000597 0.44 AML other m 2021-09-03T03:36:41.45
IV.CRMI.HHN. ML:1.9 0.000157 0.72 AML other m 2021-09-03T03:36:41.22
IV.FNVD.HHN. ML:1.8 0.00014450000000000002 1.44 AML other m 2021-09-03T03:36:41.18
IV.OSSC.HHE. ML:1.7 0.00010125000000000001 1.4 AML other m 2021-09-03T03:36:42.77
IV.PE3.EHE. ML:1.8 0.00010630000000000001 0.46 AML other m 2021-09-03T03:36:42.09
IV.BRSN.HNE. ML:2.3 0.0006670000000000001 0.48 AML other m 2021-09-03T03:36:43.24
IV.BRSN.EHE. ML:2.2 0.0004615 0.32 AML other m 2021-09-03T03:36:43.22
IV.BRSN.EHN. ML:2.2 0.000477 0.92 AML other m 2021-09-03T03:36:43.47
IV.PE3.EHN. ML:1.7 0.00009235 0.36 AML other m 2021-09-03T03:36:44.80
IV.OSSC.HHN. ML:1.6 0.0000859 1.24 AML other m 2021-09-03T03:36:45.17
IV.CAFI.HHN. ML:1.4 0.0000465 0.48 AML other m 2021-09-03T03:36:46.33
IV.CAFI.HHE. ML:1.6 0.00007245 0.56 AML other m 2021-09-03T03:36:47.25
IV.APEC.HHE. ML:1.6 0.00006864999999999999 0.52 AML other m 2021-09-03T03:36:47.04
IV.APEC.HHN. ML:1.6 0.0000742 0.88 AML other m 2021-09-03T03:36:50.07
IV.ATVO.HHE. ML:1.7 0.0000633 0.68 AML other m 2021-09-03T03:36:51.56
IV.ATVO.HHN. ML:1.5 0.00004655 1.16 AML other m 2021-09-03T03:36:53.71
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