Earthquake with magnitude of ML 1.2 on date 20-08-2019 and time 09:03:46 (UTC) in region 6 km W Santa Sofia (FC)

A magnitude ML 1.2 earthquake occured in region: 6 km W Santa Sofia (FC), on

  • 20-08-2019 09:03:46 (UTC)
  • 20-08-2019 11:03:46 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.94, 11.84 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
Santa Sofia FC 6 4136 4136
Premilcuore FC 6 799 4935
Galeata FC 9 2516 7451
Portico e San Benedetto FC 10 756 8207
Civitella di Romagna FC 11 3786 11993
Rocca San Casciano FC 13 1910 13903
Bagno di Romagna FC 15 6026 19929
Tredozio FC 17 1212 21141
San Godenzo FI 17 1167 22308
Pratovecchio Stia AR 19 5845 28153

Municipalities with at least 50000 inhabitants

An earthquake occurred to
35 Km SW of Forlì (117913 inhabitants)
38 Km S of Faenza (58541 inhabitants)
39 Km SW of Cesena (96758 inhabitants)
47 Km S of Imola (69797 inhabitants)
50 Km E of Firenze (382808 inhabitants)
53 Km N of Arezzo (99543 inhabitants)
56 Km E of Scandicci (50609 inhabitants)
60 Km E of Prato (191150 inhabitants)
60 Km W of Rimini (147750 inhabitants)
60 Km SW of Ravenna (159116 inhabitants)
73 Km SE of Bologna (386663 inhabitants)
74 Km E of Pistoia (90315 inhabitants)
80 Km NE of Siena (53903 inhabitants)
86 Km W of Pesaro (94582 inhabitants)
96 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
Rev 100 ML 1.2 2019-08-20
09:03:46
43.94 11.84 10 2019-08-20
09:14:44
Sala Sismica INGV-Roma 71644651
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-08-20 09:03:46 ± 0.19
Latitude 43.94 ± 0.01
Longitude 11.84 ± 0.02
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 71644651

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1428
Semi-minor axis of confidence ellipse (meter) 519
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 74
Circular confidence region, given by single value of horizontal uncertainty (meter) 1430
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 201
Number of associated phases, regardless of their use for origin computation 23
Number of defining phases 9
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.22
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.33365
Number of stations at which the event was observed 19
Number of stations from which data was used for origin computation 5
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.3
Num. used stations 8
Type of magnitude ML
Reference to an origin 71644651
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-08-20 09:14:44
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CIGN.HHZ. 2019-08-20T09:05:19.37 3.0 undecidable manual Sg 7.09 0
IV.SPS2.HHZ. 2019-08-20T09:05:12.71 3.0 negative manual Pn 4.43 0
IV.BRMO.HHZ. 2019-08-20T09:05:12.03 3.0 undecidable manual Sg 8.31 0
IV.PTRJ.HHZ. 2019-08-20T09:05:11.97 3.0 undecidable manual Sn -1.84 0
IV.LPEL.HHZ. 2019-08-20T09:04:51.33 3.0 undecidable manual Sn -5.2 0
IV.CTI.HHZ. 2019-08-20T09:04:48.12 3.0 undecidable manual Sg 1.24 0
IV.SBPO.HNZ. 2019-08-20T09:04:28.24 3.0 undecidable manual Sn -1.02 0
IT.VNF1.HGZ. 2019-08-20T09:04:28.17 3.0 positive manual Pn -1.97 0
IV.POFI.HHZ. 2019-08-20T09:04:28.11 3.0 undecidable manual Pg 2.47 0
IV.FDMO.HHZ. 2019-08-20T09:04:19.71 3.0 undecidable manual S -5.61 0
IV.NDIM.HHZ. 2019-08-20T09:04:08.53 3.0 positive manual P 1.02 0
IV.ZCCA.HHZ. 2019-08-20T09:04:01.21 3.0 negative manual P -0.39 0
IV.RUFI.EHZ. 2019-08-20T09:03:56.80 0.3 undecidable manual S 246 0.2581 50 -0.19 72
IV.BRSN.HNZ. 2019-08-20T09:03:54.75 3.0 undecidable manual S 0.24 0
IV.CRE.HHE. 2019-08-20T09:03:54.00 0.6 undecidable manual P 166 0.3336 50 0.09 48
IV.ASQU.HHZ. 2019-08-20T09:03:53.60 0.3 undecidable manual S 193 0.1493 121 0.26 73
IV.PIEI.HHZ. 2019-08-20T09:03:53.60 3.0 undecidable manual Pg -1.79 0
IV.LMD.HHZ. 2019-08-20T09:03:53.87 0.3 undecidable manual S 325 0.1637 119 0.05 76
IV.RUFI.EHZ. 2019-08-20T09:03:52.58 0.1 positive manual P 246 0.2581 50 -0.03 99
IV.ASQU.HHZ. 2019-08-20T09:03:50.69 0.6 positive manual P 193 0.1493 121 0.19 49
IV.LMD.HHZ. 2019-08-20T09:03:50.87 0.1 positive manual P 325 0.1637 119 0.09 100
IV.SFI.EHZ. 2019-08-20T09:03:49.80 0.6 undecidable manual S 169 0.0387 157 -0.56 46
IV.SFI.EHZ. 2019-08-20T09:03:48.75 0.3 undecidable manual P 169 0.0387 157 -0.04 78
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SFI.HNE. ML:1.3 0.000385 0.24 AML other m 2019-08-20T09:03:49.82
IV.SFI.EHE. ML:1.3 0.000379 0.24 AML other m 2019-08-20T09:03:49.82
IV.SFI.HNN. ML:1.5 0.000632 0.16 AML other m 2019-08-20T09:03:49.90
IV.SFI.EHN. ML:1.5 0.0006065 1.48 AML other m 2019-08-20T09:03:49.90
IV.ASQU.HHN. ML:1 8.165E-5 1.46 AML other m 2019-08-20T09:03:53.78
IV.ASQU.HHE. ML:0.9 6.575E-5 1.46 AML other m 2019-08-20T09:03:53.07
IV.LMD.HHN. ML:1 8.15E-5 1.12 AML other m 2019-08-20T09:03:54.64
IV.LMD.HHE. ML:1 8.205E-5 0.18 AML other m 2019-08-20T09:03:54.20
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