Earthquake with magnitude of ML 1.9 on date 01-09-2021 and time 20:44:26 (UTC) in region Premilcuore (FC)

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

  • 01-09-2021 20:44:26 (UTC)
  • 01-09-2021 22:44:26 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.9750, 11.7720 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.

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 0 799 799
Portico e San Benedetto FC 6 756 1555
Rocca San Casciano FC 11 1910 3465
Galeata FC 11 2516 5981
Santa Sofia FC 11 4136 10117
Tredozio FC 12 1212 11329
San Godenzo FI 13 1167 12496
Civitella di Romagna FC 14 3786 16282
Marradi FI 17 3139 19421
Dovadola FC 19 1653 21074

Municipalities with at least 50000 inhabitants

An earthquake occurred to
35 Km SW of Forlì (117913 inhabitants)
36 Km S of Faenza (58541 inhabitants)
42 Km W of Cesena (96758 inhabitants)
42 Km S of Imola (69797 inhabitants)
47 Km E of Firenze (382808 inhabitants)
53 Km E of Scandicci (50609 inhabitants)
55 Km E of Prato (191150 inhabitants)
57 Km N of Arezzo (99543 inhabitants)
60 Km SW of Ravenna (159116 inhabitants)
64 Km W of Rimini (147750 inhabitants)
67 Km SE of Bologna (386663 inhabitants)
69 Km E of Pistoia (90315 inhabitants)
81 Km NE of Siena (53903 inhabitants)
92 Km W of Pesaro (94582 inhabitants)
97 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 2021-09-01
20:44:26
43.9752 11.7722 7 2022-03-30
13:04:41
Bollettino Sismico Italiano INGV 102055741
Reviewed
Rev100
ML 1.9 2021-09-01
20:44:26
43.9758 11.7732 7 2021-09-01
20:50:54
Sala Sismica INGV-Roma 94933331
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-01 20:44:26 ± 0.08
Latitude 43.9752 ± 0.0045
Longitude 11.7722 ± 0.0075
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 102055741

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 596
Semi-minor axis of confidence ellipse (meter) 202
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 60
Circular confidence region, given by single value of horizontal uncertainty (meter) 600.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 79
Number of associated phases, regardless of their use for origin computation 33
Number of defining phases 33
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.32
Epicentral distance of station closest to the epicenter (degree) 0.08813
Epicentral distance of station farthest from the epicenter (degree) 0.93350
Number of stations at which the event was observed 21
Number of stations from which data was used for origin computation 21
Magnitudes information

ML:1.9

Field Value
Value 1.9
Uncertainty 0.3
Num. used stations 30
Type of magnitude ML
Reference to an origin 102055741
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-03-17 03:14:38

ML:1.9

Field Value
Value 1.9
Uncertainty 0.3
Num. used stations 30
Type of magnitude ML
Reference to an origin 94933331
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-01 20:50:54
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CAFI.HHZ. 2021-09-01T20:44:49.10 0.6 undecidable manual S 168 73.371 50 0.18 45
IV.CRMI.HHZ. 2021-09-01T20:44:47.33 0.3 undecidable manual S 253 66.378 50 0.25 67
IV.FNVD.HHZ. 2021-09-01T20:44:44.72 0.3 undecidable manual S 293 55.9995 50 0.43 66
IV.PII.HHZ. 2021-09-01T20:44:44.17 0.3 undecidable manual P 255 103.6185 50 0.26 62
IV.SSP9.EHZ. 2021-09-01T20:44:43.78 0.6 undecidable manual S 147 53.0025 50 0.29 45
IV.PARC.HHZ. 2021-09-01T20:44:43.17 0.3 undecidable manual S 134 52.0035 50 -0.06 71
IV.IMOL.EHZ. 2021-09-01T20:44:42.78 0.6 undecidable manual S 357 42.7239 50 2.04 18
IV.ATVO.HHZ. 2021-09-01T20:44:40.50 0.3 undecidable manual P 142 83.1501 50 -0.26 65
GU.POPM.HHZ. 2021-09-01T20:44:40.37 0.3 undecidable manual P 276 81.3519 50 -0.12 67
IV.CRE.HHZ. 2021-09-01T20:44:40.25 0.3 undecidable manual S 160 42.0246 50 -0.32 69
IV.CAFI.HHZ. 2021-09-01T20:44:39.18 0.1 undecidable manual P 168 73.371 50 -0.06 91
IV.CSNT.HHZ. 2021-09-01T20:44:38.38 0.1 undecidable manual P 215 67.7766 50 0 93
IV.CRMI.HHZ. 2021-09-01T20:44:38.08 0.1 undecidable manual P 253 66.378 50 -0.1 92
IV.PE3.EHZ. 2021-09-01T20:44:38.08 0.3 undecidable manual P 118 65.6898 50 0.01 70
IV.BRIS.HHZ. 2021-09-01T20:44:36.19 0.3 undecidable manual S 359 27.6501 105 0.24 72
IV.FNVD.HHZ. 2021-09-01T20:44:36.12 0.1 undecidable manual P 293 55.9995 50 -0.45 87
IV.RUFI.EHZ. 2021-09-01T20:44:35.59 0.6 undecidable manual S 234 25.9518 105 0.23 48
IV.PARC.HHZ. 2021-09-01T20:44:35.43 0.1 positive manual P 134 52.0035 50 -0.53 86
IV.MTRZ.HNN. 2021-09-01T20:44:35.25 0.3 undecidable manual P 324 46.5201 50 0.13 71
IV.BRSN.EHZ. 2021-09-01T20:44:35.30 0.6 undecidable manual P 35 42.1245 50 0.86 38
IV.SSP9.EHZ. 2021-09-01T20:44:35.75 0.3 undecidable manual P 147 53.0025 50 -0.36 67
IV.CPGN.EHZ. 2021-09-01T20:44:35.47 0.3 undecidable manual P 114 47.9187 50 0.14 71
IV.IMOL.EHZ. 2021-09-01T20:44:34.89 0.1 undecidable manual P 357 42.7239 50 0.37 91
IT.FIE.HGE. 2021-09-01T20:44:34.14 0.3 undecidable manual P 244 42.5241 50 -0.35 68
IV.CRE.HHZ. 2021-09-01T20:44:33.92 0.1 positive manual P 160 42.0246 50 -0.5 88
IV.ASQU.HHZ. 2021-09-01T20:44:33.76 0.3 undecidable manual S 176 19.869 110 0.41 70
IV.RUFI.EHZ. 2021-09-01T20:44:31.47 0.1 positive manual P 234 25.9518 105 0.05 100
IV.BRIS.HHZ. 2021-09-01T20:44:31.61 0.1 negative manual P 359 27.6501 105 -0.14 98
IV.ASQU.HHZ. 2021-09-01T20:44:30.48 0.1 positive manual P 176 19.869 110 0.23 97
IV.LMD.HHZ. 2021-09-01T20:44:30.36 0.3 undecidable manual S 336 12.4764 120 -0.66 65
IV.SFI.HNE. 2021-09-01T20:44:30.58 0.3 undecidable manual S 143 9.7791 126 0.33 73
IV.SFI.HNE. 2021-09-01T20:44:28.64 0.1 undecidable manual P 143 9.7791 126 0.18 100
IV.LMD.HHZ. 2021-09-01T20:44:28.51 0.1 positive manual P 336 12.4764 120 -0.4 95
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LMD.HHE. ML:2.4 0.0033200000000000005 0.34 AML other m 2021-09-01T20:44:30.67
IV.LMD.HHN. ML:2.3 0.00249 0.26 AML other m 2021-09-01T20:44:30.70
IV.ASQU.HHE. ML:2.2 0.0012135 0.24 AML other m 2021-09-01T20:44:34.43
IV.RUFI.EHE. ML:1.8 0.00035299999999999996 0.5 AML other m 2021-09-01T20:44:36.21
IV.BRIS.HHE. ML:2.8 0.0030949999999999997 0.32 AML other m 2021-09-01T20:44:36.53
IV.ASQU.HHN. ML:2.0 0.00074 0.86 AML other m 2021-09-01T20:44:37.46
IV.BRIS.HHN. ML:2.6 0.00246 0.78 AML other m 2021-09-01T20:44:37.64
IV.RUFI.EHN. ML:1.8 0.0003795 0.62 AML other m 2021-09-01T20:44:39.38
IV.CRE.HHN. ML:2.4 0.0007749999999999999 0.36 AML other m 2021-09-01T20:44:40.96
IV.CRE.HHE. ML:1.9 0.000241 0.78 AML other m 2021-09-01T20:44:41.53
IV.IMOL.HNE. ML:2.4 0.0008320000000000001 0.22 AML other m 2021-09-01T20:44:43.65
IV.IMOL.HNN. ML:2.4 0.0009379999999999999 0.88 AML other m 2021-09-01T20:44:44.54
IV.PARC.HHN. ML:1.7 0.000129 1.64 AML other m 2021-09-01T20:44:45.97
IV.CRMI.HHE. ML:1.6 0.0000799 0.62 AML other m 2021-09-01T20:44:48.16
IV.CRMI.HHN. ML:2.1 0.000222 1.3 AML other m 2021-09-01T20:44:48.94
IV.FNVD.HHN. ML:2.0 0.0002045 0.42 AML other m 2021-09-01T20:44:48.60
IV.PE3.EHE. ML:1.9 0.00014315 1.56 AML other m 2021-09-01T20:44:48.17
IV.CSNT.HHN. ML:1.7 0.00008360000000000001 1.3 AML other m 2021-09-01T20:44:52.10
IV.PARC.HHE. ML:1.5 0.0000852 0.56 AML other m 2021-09-01T20:44:52.64
GU.POPM.HHN. ML:2.0 0.0001505 0.3 AML other m 2021-09-01T20:44:53.05
IV.FNVD.HHE. ML:1.9 0.00019600000000000002 0.54 AML other m 2021-09-01T20:44:53.16
IV.CAFI.HHE. ML:1.8 0.00009865 0.54 AML other m 2021-09-01T20:44:54.04
IV.ATVO.HHN. ML:1.7 0.0000614 1.2 AML other m 2021-09-01T20:44:55.15
IV.CSNT.HHE. ML:1.6 0.00006465 0.7 AML other m 2021-09-01T20:44:55.75
GU.POPM.HHE. ML:1.7 0.000075 0.74 AML other m 2021-09-01T20:44:56.43
IV.CAFI.HHN. ML:1.5 0.00005575 0.82 AML other m 2021-09-01T20:44:56.14
IV.PE3.EHN. ML:1.9 0.00014319999999999998 0.54 AML other m 2021-09-01T20:44:57.83
IV.ATVO.HHE. ML:1.8 0.00007580000000000001 0.52 AML other m 2021-09-01T20:44:58.14
IV.PII.HHN. ML:2.0 0.00008305 1.1 AML other m 2021-09-01T20:44:59.14
IV.PII.HHE. ML:1.9 0.0000813 0.48 AML other m 2021-09-01T20:45:00.58
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