Earthquake with magnitude of ML 0.7 on date 18-01-2021 and time 11:17:39 (UTC) in region 7 km S Premilcuore (FC)

A magnitude ML 0.7 earthquake occured in region: 7 km S Premilcuore (FC), on

  • 18-01-2021 11:17:39 (UTC)
  • 18-01-2021 12:17:39 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.91, 11.76 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 8 799 799
San Godenzo FI 12 1167 1966
Santa Sofia FC 13 4136 6102
Portico e San Benedetto FC 13 756 6858
Pratovecchio Stia AR 14 5845 12703
Galeata FC 15 2516 15219
Londa FI 17 1840 17059
Civitella di Romagna FC 18 3786 20845
Rocca San Casciano FC 18 1910 22755
Bagno di Romagna FC 18 6026 28781
Tredozio FC 19 1212 29993
Dicomano FI 19 5515 35508
Castel San Niccolò AR 19 2707 38215

Municipalities with at least 50000 inhabitants

An earthquake occurred to
41 Km SW of Forlì (117913 inhabitants)
43 Km S of Faenza (58541 inhabitants)
43 Km E of Firenze (382808 inhabitants)
46 Km SW of Cesena (96758 inhabitants)
49 Km S of Imola (69797 inhabitants)
50 Km E of Scandicci (50609 inhabitants)
50 Km N of Arezzo (99543 inhabitants)
53 Km E of Prato (191150 inhabitants)
66 Km SW of Ravenna (159116 inhabitants)
67 Km W of Rimini (147750 inhabitants)
68 Km E of Pistoia (90315 inhabitants)
73 Km SE of Bologna (386663 inhabitants)
74 Km NE of Siena (53903 inhabitants)
92 Km W of Pesaro (94582 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 0.7 2021-01-18
11:17:39
43.91 11.76 9 2021-01-18
11:25:49
Sala Sismica INGV-Roma 86351421
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-18 11:17:39 ± 0.09
Latitude 43.91 ± 0.00
Longitude 11.76 ± 0.01
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 86351421

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 493
Semi-minor axis of confidence ellipse (meter) 310
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 235
Circular confidence region, given by single value of horizontal uncertainty (meter) 490
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 109
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 13
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) 0.06115
Epicentral distance of station farthest from the epicenter (degree) 0.32286
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:0.7

Field Value
Value 0.7
Uncertainty 0.1
Num. used stations 12
Type of magnitude ML
Reference to an origin 86351421
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-01-18 11:25:49
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CRE.HHZ. 2021-01-18T11:17:51.39 0.6 undecidable manual S 155 0.3229 50 -0.06 50
IV.RUFI.EHZ. 2021-01-18T11:17:47.05 0.6 undecidable manual S 248 0.1961 113 -0.19 50
IV.CRE.HHZ. 2021-01-18T11:17:46.15 0.3 negative manual P 155 0.3229 50 -0.05 76
IV.LMD.HHZ. 2021-01-18T11:17:46.18 0.6 undecidable manual S 347 0.1709 116 -0.17 51
IV.RONT.HHZ. 2021-01-18T11:17:44.89 0.6 undecidable manual P 289 0.2509 108 -0.02 52
IV.RINC.HHZ. 2021-01-18T11:17:44.40 0.6 undecidable manual S 258 0.1142 126 -0.08 52
IV.ASQU.HHZ. 2021-01-18T11:17:44.12 0.6 undecidable manual S 170 0.116 126 -0.41 49
IV.LMD.HHZ. 2021-01-18T11:17:43.06 0.3 negative manual P 347 0.1709 116 -0.2 76
IV.RUFI.EHZ. 2021-01-18T11:17:43.88 0.3 positive manual P 248 0.1961 113 0.11 77
IV.RINC.HHZ. 2021-01-18T11:17:42.47 0.1 positive manual P 258 0.1142 126 0.29 100
IV.ASQU.HHZ. 2021-01-18T11:17:42.29 0.3 undecidable manual P 170 0.116 126 0.08 78
IV.SFI.EHZ. 2021-01-18T11:17:42.93 0.6 undecidable manual S 96 0.0612 144 -0.09 53
IV.SFI.EHZ. 2021-01-18T11:17:41.68 0.3 positive manual P 96 0.0612 144 0.35 75
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SFI.EHN. ML:0.9 0.0001215 0.12 AML other m 2021-01-18T11:17:43.23
IV.SFI.EHE. ML:0.7 7.7563555E-5 0.1024 AML other m 2021-01-18T11:17:44.38
IV.LMD.HHN. ML:0.8 4.878351E-5 0.096 AML other m 2021-01-18T11:17:46.98
IV.LMD.HHE. ML:0.8 4.317869E-5 0.1408 AML other m 2021-01-18T11:17:47.06
IV.SFI.HNE. ML:0.7 8.740952E-5 0.1088 AML other m 2021-01-18T11:17:44.43
IV.SFI.HNN. ML:1 0.00014427425 0.1088 AML other m 2021-01-18T11:17:43.17
IV.RINC.HHE. ML:0.7 5.971813E-5 0.384 AML other m 2021-01-18T11:17:44.83
IV.RINC.HHN. ML:0.6 4.421303E-5 0.224 AML other m 2021-01-18T11:17:44.56
IV.RUFI.EHE. ML:0.5 1.890918E-5 0.3584 AML other m 2021-01-18T11:17:47.66
IV.RUFI.EHN. ML:0.6 2.64739625E-5 0.3392 AML other m 2021-01-18T11:17:47.31
IV.CRE.HHE. ML:0.8 2.6704045E-5 1.3248 AML other m 2021-01-18T11:17:48.72
IV.CRE.HHN. ML:0.7 2.0767405E-5 1.4016 AML other m 2021-01-18T11:18:02.43
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