Earthquake with magnitude of ML 0.9 on date 18-08-2019 and time 11:02:45 (Italy) in region 5 km W Santa Sofia (FC)

A magnitude ML 0.9 earthquake occured in region: 5 km W Santa Sofia (FC), on

  • 18-08-2019 09:02:45 (UTC)
  • 18-08-2019 11:02:45 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.93, 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 5 4136 4136
Premilcuore FC 7 799 4935
Galeata FC 9 2516 7451
Civitella di Romagna FC 11 3786 11237
Portico e San Benedetto FC 12 756 11993
Bagno di Romagna FC 14 6026 18019
Rocca San Casciano FC 14 1910 19929
San Godenzo FI 18 1167 21096
Tredozio FC 18 1212 22308
Pratovecchio Stia AR 19 5845 28153
Verghereto FC 20 1907 30060

Municipalities with at least 50000 inhabitants

An earthquake occurred to
36 Km SW of Forlì (117913 inhabitants)
39 Km SW of Cesena (96758 inhabitants)
40 Km S of Faenza (58541 inhabitants)
48 Km S of Imola (69797 inhabitants)
51 Km E of Firenze (382808 inhabitants)
52 Km N of Arezzo (99543 inhabitants)
57 Km E of Scandicci (50609 inhabitants)
60 Km W of Rimini (147750 inhabitants)
60 Km E of Prato (191150 inhabitants)
61 Km SW of Ravenna (159116 inhabitants)
74 Km E of Pistoia (90315 inhabitants)
74 Km SE of Bologna (386663 inhabitants)
80 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 0.9 2019-08-18
09:02:45
43.93 11.84 8 2019-08-18
09:09:24
Sala Sismica INGV-Roma 71598771
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-08-18 09:02:45 ± 0.12
Latitude 43.93 ± 0.00
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 71598771

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 818
Semi-minor axis of confidence ellipse (meter) 264
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 63
Circular confidence region, given by single value of horizontal uncertainty (meter) 820
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 200
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.21
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.36962
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 6
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 71598771
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-08-18 09:09:24
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.SEI.HHZ. 2019-08-18T09:03:00.01 0.3 undecidable manual S 289 0.3696 50 0.16 68
IV.CRE.HHZ. 2019-08-18T09:02:58.43 0.3 undecidable manual S 166 0.3229 50 -0.03 71
IV.RUFI.EHZ. 2019-08-18T09:02:55.91 0.3 undecidable manual S 249 0.259 106 -0.25 68
IV.SEI.HHZ. 2019-08-18T09:02:53.70 0.3 positive manual P 289 0.3696 50 -0.21 67
IV.LMD.HHZ. 2019-08-18T09:02:53.29 0.3 undecidable manual S 326 0.1754 113 0.18 71
IV.ASQU.HHZ. 2019-08-18T09:02:52.29 0.3 undecidable manual S 196 0.1412 117 0.36 68
IV.CRE.HHZ. 2019-08-18T09:02:52.88 0.6 negative manual P 166 0.3229 50 -0.22 45
IV.PARC.HHZ. 2019-08-18T09:02:51.57 3.0 undecidable manual P 0
IV.RUFI.EHZ. 2019-08-18T09:02:51.64 0.3 positive manual P 249 0.259 106 -0.14 70
IV.LMD.HHZ. 2019-08-18T09:02:50.07 0.6 negative manual P 326 0.1754 113 0.05 48
IV.ASQU.HHZ. 2019-08-18T09:02:49.59 0.1 positive manual P 196 0.1412 117 0.26 93
IV.SFI.EHZ. 2019-08-18T09:02:48.50 0.3 undecidable manual S 176 0.0279 159 -0.32 70
IV.SFI.EHZ. 2019-08-18T09:02:47.55 0.1 undecidable manual P 176 0.0279 159 0.01 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SFI.EHE. ML:1.8 0.0012046376 0.0832 AML other m 2019-08-18T09:02:48.54
IV.SFI.EHN. ML:2 0.00169974155 0.0832 AML other m 2019-08-18T09:02:48.60
IV.SFI.HNE. ML:1.8 0.0011689844 0.0704 AML other m 2019-08-18T09:02:48.53
IV.SFI.HNN. ML:1.9 0.0016858314 0.0768 AML other m 2019-08-18T09:02:48.60
IV.ASQU.HHE. ML:0.8 5.3767925E-5 0.1408 AML other m 2019-08-18T09:02:53.83
IV.ASQU.HHN. ML:0.9 8.6780985E-5 0.16 AML other m 2019-08-18T09:02:52.60
IV.LMD.HHE. ML:1.1 0.00010661525 0.1408 AML other m 2019-08-18T09:02:53.42
IV.LMD.HHN. ML:1.1 9.5889625E-5 0.1408 AML other m 2019-08-18T09:02:53.71
IV.RUFI.EHE. ML:0.7 2.6353945E-5 0.2176 AML other m 2019-08-18T09:02:56.13
IV.RUFI.EHN. ML:0.9 4.7262875E-5 0.2176 AML other m 2019-08-18T09:02:56.16
IV.CRE.HHE. ML:0.6 1.438775E-5 0.3392 AML other m 2019-08-18T09:02:58.84
IV.CRE.HHN. ML:0.9 3.674492E-5 0.3008 AML other m 2019-08-18T09:02:58.63
IV.SEI.HHE. ML:1 3.6254105E-5 0.2816 AML other m 2019-08-18T09:03:00.82
IV.SEI.HHN. ML:1.4 9.6897465E-5 0.3584 AML other m 2019-08-18T09:03:00.44
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