Earthquake with magnitude of ML 1.2 on date 18-08-2019 and time 00:09:04 (Italy) in region 6 km W Santa Sofia (FC)

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

  • 17-08-2019 22:09:04 (UTC)
  • 18-08-2019 00:09:04 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.92, 11.84 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
Santa Sofia FC 6 4136 4136
Premilcuore FC 8 799 4935
Galeata FC 10 2516 7451
Civitella di Romagna FC 12 3786 11237
Portico e San Benedetto FC 12 756 11993
Bagno di Romagna FC 13 6026 18019
Rocca San Casciano FC 15 1910 19929
San Godenzo FI 18 1167 21096
Pratovecchio Stia AR 18 5845 26941
Tredozio FC 19 1212 28153
Verghereto FC 20 1907 30060

Municipalities with at least 50000 inhabitants

An earthquake occurred to
37 Km SW of Forlì (117913 inhabitants)
40 Km SW of Cesena (96758 inhabitants)
40 Km S of Faenza (58541 inhabitants)
49 Km S of Imola (69797 inhabitants)
50 Km E of Firenze (382808 inhabitants)
51 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)
62 Km SW of Ravenna (159116 inhabitants)
74 Km E of Pistoia (90315 inhabitants)
75 Km SE of Bologna (386663 inhabitants)
79 Km NE of Siena (53903 inhabitants)
86 Km W of Pesaro (94582 inhabitants)
95 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 2019-08-17
22:09:04
43.92 11.84 8 2019-08-17
22:13:22
Sala Sismica INGV-Roma 71583251
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-08-17 22:09:04 ± 0.14
Latitude 43.92 ± 0.01
Longitude 11.84 ± 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 71583251

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 908
Semi-minor axis of confidence ellipse (meter) 411
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 85
Circular confidence region, given by single value of horizontal uncertainty (meter) 910
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 173
Number of associated phases, regardless of their use for origin computation 14
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.32
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.36872
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 6
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 71583251
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-08-17 22:13:22
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.ATMI.HHZ. 2019-08-17T22:09:28.48 3.0 undecidable manual S 0.05 0
IV.ARVD.HHZ. 2019-08-17T22:09:19.55 3.0 undecidable manual P -2.49 0
IV.SEI.HHZ. 2019-08-17T22:09:18.11 0.1 undecidable manual S 291 0.3687 50 0.06 94
IV.BRIS.HHZ. 2019-08-17T22:09:16.55 0.1 undecidable manual S 350 0.304 103 0.49 87
IV.CRE.HHZ. 2019-08-17T22:09:16.53 0.3 undecidable manual S 165 0.3157 50 0.05 72
IV.RUFI.EHZ. 2019-08-17T22:09:14.02 0.1 undecidable manual S 250 0.2527 106 -0.1 96
IV.SEI.HHZ. 2019-08-17T22:09:11.78 0.1 negative manual P 291 0.3687 50 -0.33 89
IV.CRE.HHZ. 2019-08-17T22:09:11.03 0.6 undecidable manual P 165 0.3157 50 -0.18 47
IV.BRIS.HHZ. 2019-08-17T22:09:10.85 0.1 undecidable manual P 350 0.304 103 -0.11 95
IV.ASQU.HHZ. 2019-08-17T22:09:10.40 0.1 undecidable manual S 196 0.1322 119 0.57 87
IV.RUFI.EHZ. 2019-08-17T22:09:09.70 0.1 undecidable manual P 250 0.2527 106 -0.14 95
IV.ASQU.HHZ. 2019-08-17T22:09:07.68 0.6 positive manual P 196 0.1322 119 0.32 47
IV.SFI.EHZ. 2019-08-17T22:09:06.53 0.1 undecidable manual S 163 0.0207 164 -0.38 94
IV.SFI.EHZ. 2019-08-17T22:09:05.58 0.1 undecidable manual P 163 0.0207 164 -0.1 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ASQU.HHN. ML:1.2 0.000183 1.28 AML other m 2019-08-17T22:09:10.70
IV.ASQU.HHE. ML:1.1 0.0001395 1.42 AML other m 2019-08-17T22:09:10.01
IV.RUFI.EHE. ML:0.9 4.65E-5 1.38 AML other m 2019-08-17T22:09:14.87
IV.RUFI.EHN. ML:1.2 8.99E-5 0.24 AML other m 2019-08-17T22:09:14.25
IV.BRIS.HHE. ML:1.2 6.96E-5 1.22 AML other m 2019-08-17T22:09:16.86
IV.CRE.HHN. ML:1.4 0.0001085 1.8 AML other m 2019-08-17T22:09:16.03
IV.BRIS.HHN. ML:1.2 7.68E-5 0.84 AML other m 2019-08-17T22:09:17.80
IV.CRE.HHE. ML:0.8 2.735E-5 1.42 AML other m 2019-08-17T22:09:18.15
IV.SEI.HHE. ML:1.2 5.015E-5 0.74 AML other m 2019-08-17T22:09:18.28
IV.SEI.HHN. ML:1.4 7.755E-5 0.96 AML other m 2019-08-17T22:09:18.98
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