Earthquake with magnitude of ML 0.9 on date 17-10-2020 and time 08:46:20 (Italy) in region 1 km NE Premilcuore (FC)

A magnitude ML 0.9 earthquake occured in region: 1 km NE Premilcuore (FC), on

  • 17-10-2020 06:46:20 (UTC)
  • 17-10-2020 08:46:20 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.98, 11.79 at 10 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 5 756 1555
Rocca San Casciano FC 10 1910 3465
Galeata FC 10 2516 5981
Santa Sofia FC 10 4136 10117
Tredozio FC 11 1212 11329
Civitella di Romagna FC 12 3786 15115
San Godenzo FI 15 1167 16282
Dovadola FC 17 1653 17935
Marradi FI 17 3139 21074
Modigliana FC 19 4560 25634

Municipalities with at least 50000 inhabitants

An earthquake occurred to
33 Km SW of Forlì (117913 inhabitants)
34 Km S of Faenza (58541 inhabitants)
40 Km W of Cesena (96758 inhabitants)
42 Km S of Imola (69797 inhabitants)
49 Km E of Firenze (382808 inhabitants)
55 Km E of Scandicci (50609 inhabitants)
57 Km E of Prato (191150 inhabitants)
58 Km N of Arezzo (99543 inhabitants)
58 Km SW of Ravenna (159116 inhabitants)
63 Km W of Rimini (147750 inhabitants)
67 Km SE of Bologna (386663 inhabitants)
70 Km E of Pistoia (90315 inhabitants)
83 Km NE of Siena (53903 inhabitants)
90 Km W of Pesaro (94582 inhabitants)
96 Km S of Ferrara (133155 inhabitants)
100 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 0.9 2020-10-17
06:46:20
43.98 11.79 10 2020-10-17
06:56:02
Sala Sismica INGV-Roma 83837931
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-10-17 06:46:20 ± 0.2
Latitude 43.98 ± 0.01
Longitude 11.79 ± 0.02
Depth (km) 10 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 83837931

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1598
Semi-minor axis of confidence ellipse (meter) 1261
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 134
Circular confidence region, given by single value of horizontal uncertainty (meter) 1600
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 157
Number of associated phases, regardless of their use for origin computation 14
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.38
Epicentral distance of station closest to the epicenter (degree) 0.08993
Epicentral distance of station farthest from the epicenter (degree) 0.32645
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:0.9

Field Value
Value 0.9
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 83837931
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-10-17 06:56:02
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.VISG.HHN. 2020-10-17T06:46:33.38 0.6 undecidable manual S 309 0.3265 50 0.28 46
IV.RUFI.EHZ. 2020-10-17T06:46:30.64 0.6 undecidable manual S 234 0.25 50 -0.18 48
IV.BRIS.HHZ. 2020-10-17T06:46:30.84 0.6 undecidable manual S 356 0.2401 110 0.31 47
IV.RONT.HHE. 2020-10-17T06:46:30.96 0.6 undecidable manual S 272 0.2572 50 -0.07 49
IV.ASQU.HHZ. 2020-10-17T06:46:28.93 0.6 undecidable manual S 180 0.188 115 0.25 48
IV.RINC.HHZ. 2020-10-17T06:46:28.06 0.6 undecidable manual S 233 0.1646 118 0.19 49
IV.RONT.HHE. 2020-10-17T06:46:27.62 0.1 undecidable manual P 272 0.2572 50 0.96 74
IV.BRIS.HHZ. 2020-10-17T06:46:26.38 1.0 undecidable manual P 356 0.2401 110 0.02 25
IV.VISG.HHN. 2020-10-17T06:46:26.96 0.1 undecidable manual P 309 0.3265 50 -0.89 75
IV.RUFI.EHZ. 2020-10-17T06:46:26.33 0.1 positive manual P 234 0.25 50 -0.2 96
IV.ASQU.HHZ. 2020-10-17T06:46:25.25 0.1 undecidable manual P 180 0.188 115 -0.05 100
IV.SFI.EHZ. 2020-10-17T06:46:25.54 0.6 undecidable manual S 153 0.0899 134 0.01 51
IV.RINC.HHZ. 2020-10-17T06:46:24.62 0.1 undecidable manual P 233 0.1646 118 -0.21 97
IV.SFI.EHZ. 2020-10-17T06:46:23.50 0.3 positive manual P 153 0.0899 134 0.02 77
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SFI.EHE. ML:0.9 9.72E-5 0.08 AML other m 2020-10-17T06:46:25.72
IV.SFI.EHN. ML:1 0.0001168 1.56 AML other m 2020-10-17T06:46:26.82
IV.ASQU.HHE. ML:0.8 4.565E-5 0.22 AML other m 2020-10-17T06:46:29.22
IV.ASQU.HHN. ML:0.7 3.475E-5 1.2 AML other m 2020-10-17T06:46:29.84
IV.BRIS.HHE. ML:1.2 8.22E-5 0.34 AML other m 2020-10-17T06:46:31.13
IV.BRIS.HHN. ML:1.2 8.445E-5 1.24 AML other m 2020-10-17T06:46:31.24
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