Earthquake with magnitude of ML 1.9 on date 21-01-2021 and time 07:50:00 (UTC) in region 3 km E Premilcuore (FC)

A magnitude ML 1.9 earthquake occured in region: 3 km E Premilcuore (FC), on

  • 21-01-2021 07:50:00 (UTC)
  • 21-01-2021 08:50:00 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.98, 11.81 at 8 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 3 799 799
Portico e San Benedetto FC 6 756 1555
Santa Sofia FC 8 4136 5691
Galeata FC 8 2516 8207
Rocca San Casciano FC 10 1910 10117
Civitella di Romagna FC 11 3786 13903
Tredozio FC 13 1212 15115
San Godenzo FI 16 1167 16282
Dovadola FC 18 1653 17935
Bagno di Romagna FC 19 6026 23961
Marradi FI 20 3139 27100
Predappio FC 20 6346 33446

Municipalities with at least 50000 inhabitants

An earthquake occurred to
33 Km SW of Forlì (117913 inhabitants)
35 Km S of Faenza (58541 inhabitants)
39 Km W of Cesena (96758 inhabitants)
43 Km S of Imola (69797 inhabitants)
50 Km E of Firenze (382808 inhabitants)
56 Km E of Scandicci (50609 inhabitants)
57 Km N of Arezzo (99543 inhabitants)
58 Km E of Prato (191150 inhabitants)
58 Km SW of Ravenna (159116 inhabitants)
61 Km W of Rimini (147750 inhabitants)
69 Km SE of Bologna (386663 inhabitants)
72 Km E of Pistoia (90315 inhabitants)
83 Km NE of Siena (53903 inhabitants)
89 Km W of Pesaro (94582 inhabitants)
97 Km S of Ferrara (133155 inhabitants)
98 Km W of Fano (60888 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 1.9 2021-01-21
07:50:00
43.98 11.81 8 2021-01-21
07:57:28
Sala Sismica INGV-Roma 86424831
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-21 07:50:00 ± 0.16
Latitude 43.98 ± 0.01
Longitude 11.81 ± 0.01
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 86424831

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1150
Semi-minor axis of confidence ellipse (meter) 622
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 240
Circular confidence region, given by single value of horizontal uncertainty (meter) 1150
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 144
Number of associated phases, regardless of their use for origin computation 28
Number of defining phases 24
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.49
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.67539
Number of stations at which the event was observed 16
Number of stations from which data was used for origin computation 12
Magnitude information

ML:1.9

Field Value
Value 1.9
Uncertainty 0.3
Num. used stations 22
Type of magnitude ML
Reference to an origin 86424831
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-01-21 07:57:28
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.ATPI.EHZ. 2021-01-21T07:50:24.13 0.3 undecidable manual S 141 0.6754 50 0.87 53
IV.BADI.EHZ. 2021-01-21T07:50:20.24 0.3 undecidable manual S 146 0.5603 50 0.4 64
IV.SSP9.EHZ. 2021-01-21T07:50:17.03 0.6 undecidable manual S 150 0.4623 50 0.08 47
IV.PARC.HHZ. 2021-01-21T07:50:16.67 0.3 undecidable manual S 137 0.4479 50 0.14 70
IV.NARO.HHZ. 2021-01-21T07:50:13.18 3.0 undecidable manual P -0.25 0
IV.SEI.HHZ. 2021-01-21T07:50:13.20 0.6 undecidable manual S 284 0.3354 50 0 49
IV.ATPI.EHZ. 2021-01-21T07:50:13.27 0.1 undecidable manual P 141 0.6754 50 -0.19 87
IV.CRE.HHZ. 2021-01-21T07:50:13.87 0.3 undecidable manual S 164 0.3696 50 -0.34 68
IV.CAFI.HHZ. 2021-01-21T07:50:13.46 3.0 negative manual P 0.36 0
IV.PIEI.HHZ. 2021-01-21T07:50:12.93 3.0 negative manual P -0.81 0
IV.BADI.EHZ. 2021-01-21T07:50:11.22 0.6 negative manual P 146 0.5603 50 -0.27 44
IV.RONT.HHZ. 2021-01-21T07:50:11.78 0.3 undecidable manual S 274 0.2734 104 0.83 58
IV.BRIS.HHZ. 2021-01-21T07:50:11.58 0.3 undecidable manual S 353 0.2518 106 1.45 43
IV.MPPT.EHZ. 2021-01-21T07:50:10.91 3.0 undecidable manual P -0.08 0
IV.PARC.HHZ. 2021-01-21T07:50:09.25 0.1 negative manual P 137 0.4479 50 -0.33 89
IV.SSP9.EHZ. 2021-01-21T07:50:09.67 0.6 positive manual P 150 0.4623 50 -0.15 46
IV.ASQU.HHZ. 2021-01-21T07:50:07.63 0.3 undecidable manual S 185 0.179 111 0.15 73
IV.RINC.HHZ. 2021-01-21T07:50:07.29 0.3 undecidable manual S 239 0.1727 112 0.05 75
IV.SEI.HHZ. 2021-01-21T07:50:07.45 0.1 negative manual P 284 0.3354 50 -0.2 94
IV.CRE.HHZ. 2021-01-21T07:50:07.75 0.1 positive manual P 164 0.3696 50 -0.49 87
IV.RONT.HHZ. 2021-01-21T07:50:06.49 0.1 negative manual P 274 0.2734 104 0.14 96
IV.BRIS.HHZ. 2021-01-21T07:50:06.49 0.1 positive manual P 353 0.2518 106 0.61 85
IV.ASQU.HHZ. 2021-01-21T07:50:04.37 0.1 positive manual P 185 0.179 111 0.02 100
IV.LMD.HHZ. 2021-01-21T07:50:04.18 0.3 undecidable manual S 324 0.1268 119 -1.49 43
IV.RINC.HHZ. 2021-01-21T07:50:04.38 0.1 positive manual P 239 0.1727 112 0.17 97
IV.SFI.HNZ. 2021-01-21T07:50:03.90 0.3 undecidable manual S 160 0.0746 133 -0.12 75
IV.SFI.HNZ. 2021-01-21T07:50:02.47 0.1 positive manual P 160 0.0746 133 0.12 100
IV.LMD.HHZ. 2021-01-21T07:50:01.67 0.1 positive manual P 324 0.1268 119 -1.63 52
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SFI.EHE. ML:2.5 0.00508 1.76 AML other m 2021-01-21T07:50:03.98
IV.SFI.HNE. ML:2.5 0.00515 1.78 AML other m 2021-01-21T07:50:03.98
IV.SFI.EHN. ML:2.3 0.00336 1.9 AML other m 2021-01-21T07:50:04.02
IV.SFI.HNN. ML:2.3 0.003325 1.88 AML other m 2021-01-21T07:50:04.02
IV.RINC.HHE. ML:1.8 0.000505 0.76 AML other m 2021-01-21T07:50:07.39
IV.RINC.HHN. ML:1.7 0.0003925 0.4 AML other m 2021-01-21T07:50:07.71
IV.ASQU.HHN. ML:2.1 0.000962 1.44 AML other m 2021-01-21T07:50:08.76
IV.ASQU.HHE. ML:1.9 0.000658 1.34 AML other m 2021-01-21T07:50:08.13
IV.BRIS.HHE. ML:2.3 0.001001 0.22 AML other m 2021-01-21T07:50:11.80
IV.BRIS.HHN. ML:2.1 0.0007265 1.72 AML other m 2021-01-21T07:50:11.91
IV.RONT.HHE. ML:2.1 0.000692 1.44 AML other m 2021-01-21T07:50:12.87
IV.RONT.HHN. ML:2 0.000521 1.52 AML other m 2021-01-21T07:50:12.21
IV.SEI.HHE. ML:2 0.0004005 0.38 AML other m 2021-01-21T07:50:13.85
IV.SEI.HHN. ML:2.2 0.000679 0.26 AML other m 2021-01-21T07:50:14.14
IV.CRE.HHN. ML:1.9 0.000254 0.54 AML other m 2021-01-21T07:50:14.18
IV.CRE.HHE. ML:1.7 0.0001765 0.18 AML other m 2021-01-21T07:50:14.88
IV.PARC.HHE. ML:1.3 4.965E-5 1.2 AML other m 2021-01-21T07:50:18.94
IV.PARC.HHN. ML:1.6 0.0001021 1.5 AML other m 2021-01-21T07:50:21.19
IV.CAFI.HHE. ML:1.3 3.055E-5 0.5 AML other m 2021-01-21T07:50:25.63
IV.ATPI.EHN. ML:1.4 4.06E-5 1.32 AML other m 2021-01-21T07:50:25.92
IV.CAFI.HHN. ML:1.3 2.945E-5 0.92 AML other m 2021-01-21T07:50:26.19
IV.ATPI.EHE. ML:1.4 4.245E-5 1.1 AML other m 2021-01-21T07:50:26.88
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download