Earthquake with magnitude of ML 1.5 on date 08-09-2021 and time 07:51:50 (UTC) in region 1 km W Premilcuore (FC)

A magnitude ML 1.5 earthquake occured in region: 1 km W Premilcuore (FC), on

  • 08-09-2021 07:51:50 (UTC)
  • 08-09-2021 09:51:50 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.978, 11.763 at 9 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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 1 799 799
Portico e San Benedetto FC 6 756 1555
Rocca San Casciano FC 11 1910 3465
Tredozio FC 12 1212 4677
Galeata FC 12 2516 7193
Santa Sofia FC 12 4136 11329
San Godenzo FI 13 1167 12496
Civitella di Romagna FC 15 3786 16282
Marradi FI 16 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 S of Imola (69797 inhabitants)
42 Km W of Cesena (96758 inhabitants)
47 Km E of Firenze (382808 inhabitants)
53 Km E of Scandicci (50609 inhabitants)
54 Km E of Prato (191150 inhabitants)
58 Km N of Arezzo (99543 inhabitants)
60 Km SW of Ravenna (159116 inhabitants)
65 Km W of Rimini (147750 inhabitants)
67 Km SE of Bologna (386663 inhabitants)
68 Km E of Pistoia (90315 inhabitants)
81 Km NE of Siena (53903 inhabitants)
93 Km W of Pesaro (94582 inhabitants)
96 Km S of Ferrara (133155 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web questionnaire

This map shows the distribution of earthquake resentment in the area, expressed in terms of intensity on the MCS scale (Mercalli-Cancani-Sieberg). Intensities are determined using data from questionnaires collected on the website http://www.hsit.it. The intensities shown are determined considering all the reports received from each municipality, and are all the more reliable the greater the number of questionnaires. The collected data are subjected to an automatic statistical filter, but are not checked individually. In particular, intensities greater than or equal to the VI degree of the MCS or EMS scale require on-site verification by specialized personnel. The black star is the epicenter of the earthquake that occurred. This map is updated every time citizens fill out new questionnaires. The number of questionnaires processed to obtain this map, the date and time of the last update are shown at the top right.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 1.5 2021-09-08
07:51:50
43.9777 11.7632 9 2021-09-08
07:58:22
Sala Sismica INGV-Roma 95188821
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-08 07:51:50 ± 0.06
Latitude 43.9777 ± 0.0036
Longitude 11.7632 ± 0.0050
Depth (km) 9 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 95188821

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 408
Semi-minor axis of confidence ellipse (meter) 275
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) 410
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 78
Number of associated phases, regardless of their use for origin computation 26
Number of defining phases 23
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.19
Epicentral distance of station closest to the epicenter (degree) 0.09443
Epicentral distance of station farthest from the epicenter (degree) 0.6646
Number of stations at which the event was observed 15
Number of stations from which data was used for origin computation 15
Magnitude information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 26
Type of magnitude ML
Reference to an origin 95188821
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-08 07:58:22
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CRMI.HHZ. 2021-09-08T07:52:11.72 3.0 undecidable manual S 252 0.5936 50 0.95 0
IV.MPPT.EHZ. 2021-09-08T07:52:08.22 3.0 undecidable manual S 268 0.4847 50 0.67 0
IV.MOCL.EHZ. 2021-09-08T07:52:06.09 3.0 undecidable manual S 274 0.42 50 0.46 0
IV.CRE.HHZ. 2021-09-08T07:52:04.64 0.6 undecidable manual S 159 0.3831 50 0.08 47
IV.CAFI.HHZ. 2021-09-08T07:52:03.77 1.0 undecidable manual P 167 0.6646 50 0.46 21
IV.VISG.HHZ. 2021-09-08T07:52:02.55 0.6 undecidable manual S 312 0.3166 50 -0.03 49
IV.CRMI.HHZ. 2021-09-08T07:52:02.32 0.3 undecidable manual P 252 0.5936 50 0.24 66
IV.SEI.HHZ. 2021-09-08T07:52:02.19 0.6 undecidable manual S 285 0.3004 50 0.08 48
IV.BOSL.HHZ. 2021-09-08T07:52:01.96 0.6 undecidable manual S 261 0.2833 105 0.41 45
IV.MPPT.EHZ. 2021-09-08T07:52:00.24 0.1 undecidable manual P 268 0.4847 50 0.01 94
IV.BRIS.HHZ. 2021-09-08T07:52:00.36 0.6 undecidable manual S 1 0.2464 108 0.17 48
IV.RUFI.EHZ. 2021-09-08T07:51:59.81 0.6 undecidable manual S 233 0.2302 109 0.23 47
IV.BRSN.HNE. 2021-09-08T07:51:59.00 0.6 undecidable manual P 36 0.3813 50 0.54 43
IV.CPGN.HNE. 2021-09-08T07:51:59.67 0.6 undecidable manual P 114 0.4389 50 0.23 46
IV.MOCL.EHZ. 2021-09-08T07:51:59.04 0.1 undecidable manual P 274 0.42 50 -0.08 94
IV.CRE.HHZ. 2021-09-08T07:51:58.10 0.3 positive manual P 159 0.3831 50 -0.4 67
IV.ASQU.HHZ. 2021-09-08T07:51:58.00 0.6 undecidable manual S 174 0.1817 113 0.15 49
IV.IMOL.EHE. 2021-09-08T07:51:58.58 0.1 undecidable manual P 358 0.3822 50 0.11 94
IV.SEI.HHZ. 2021-09-08T07:51:56.72 0.1 positive manual P 285 0.3004 50 -0.36 91
IV.VISG.HHZ. 2021-09-08T07:51:56.96 1.0 undecidable manual P 312 0.3166 50 -0.4 23
IV.BOSL.HHZ. 2021-09-08T07:51:56.61 0.1 undecidable manual P 261 0.2833 105 -0.15 95
IV.RUFI.EHZ. 2021-09-08T07:51:55.55 0.1 undecidable manual P 233 0.2302 109 -0.07 98
IV.BRIS.HHZ. 2021-09-08T07:51:55.70 0.6 positive manual P 1 0.2464 108 -0.27 47
IV.ASQU.HHZ. 2021-09-08T07:51:54.64 0.1 positive manual P 174 0.1817 113 0.02 100
IV.SFI.EHZ. 2021-09-08T07:51:54.81 0.6 undecidable manual S 140 0.0944 130 -0.14 50
IV.SFI.EHZ. 2021-09-08T07:51:52.83 0.6 positive manual P 140 0.0944 130 -0.12 50
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SFI.EHE. ML:1.7 0.00070547415 0.0832 AML other m 2021-09-08T07:51:54.99
IV.SFI.EHN. ML:1.7 0.0006485 1.84 AML other m 2021-09-08T07:51:54.93
IV.SFI.HNN. ML:1.7 0.000658 1.84 AML other m 2021-09-08T07:51:54.93
IV.SFI.HNE. ML:1.7 0.000698 1.92 AML other m 2021-09-08T07:51:54.99
IV.ASQU.HHE. ML:1.7 0.0003625 0.18 AML other m 2021-09-08T07:51:58.59
IV.ASQU.HHN. ML:1.4 0.000182 0.52 AML other m 2021-09-08T07:51:59.03
IV.RUFI.EHE. ML:1.1 8.183E-5 0.88 AML other m 2021-09-08T07:52:00.81
IV.RUFI.EHN. ML:1.3 0.0001215 0.28 AML other m 2021-09-08T07:52:00.24
IV.BRIS.HHE. ML:2 0.000628 0.36 AML other m 2021-09-08T07:52:00.63
IV.BRIS.HHN. ML:1.9 0.0004695 0.26 AML other m 2021-09-08T07:52:01.36
IV.BOSL.HHN. ML:1.4 0.000113 0.36 AML other m 2021-09-08T07:52:02.50
IV.SEI.HHN. ML:2.1 0.00062 0.32 AML other m 2021-09-08T07:52:02.67
IV.SEI.HHE. ML:1.9 0.0003675 0.46 AML other m 2021-09-08T07:52:02.68
IV.BOSL.HHE. ML:1.2 7.405E-5 0.66 AML other m 2021-09-08T07:52:02.41
IV.VISG.HHN. ML:1 4.47E-5 0.66 AML other m 2021-09-08T07:52:03.14
IV.CRE.HHN. ML:1.8 0.0001965 1.66 AML other m 2021-09-08T07:52:05.11
IV.VISG.HHE. ML:0.9 2.76E-5 0.3 AML other m 2021-09-08T07:52:05.63
IV.CRE.HHE. ML:1.3 5.785E-5 0.52 AML other m 2021-09-08T07:52:06.32
IV.MOCL.EHN. ML:1.5 8.445E-5 0.9 AML other m 2021-09-08T07:52:06.44
IV.MOCL.EHE. ML:1.4 7.57E-5 1.04 AML other m 2021-09-08T07:52:06.88
IV.MPPT.EHN. ML:1.4 6.73E-5 0.86 AML other m 2021-09-08T07:52:08.91
IV.MPPT.EHE. ML:1.2 3.475E-5 0.42 AML other m 2021-09-08T07:52:11.46
IV.CRMI.HHN. ML:1.4 5.085E-5 0.7 AML other m 2021-09-08T07:52:12.10
IV.CRMI.HHE. ML:1 1.97E-5 0.32 AML other m 2021-09-08T07:52:12.80
IV.CAFI.HHE. ML:1.2 2.495E-5 1.04 AML other m 2021-09-08T07:52:16.88
IV.CAFI.HHN. ML:1.2 2.28E-5 0.94 AML other m 2021-09-08T07:52:20.24
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