Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 18-08-2019 and time 10:23:01 (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

  • 18-08-2019 08:23:01 (UTC)
  • 18-08-2019 10:23:01 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.9310, 11.8340 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.

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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 7 799 4935
Galeata FC 10 2516 7451
Portico e San Benedetto FC 11 756 8207
Civitella di Romagna FC 12 3786 11993
Bagno di Romagna FC 14 6026 18019
Rocca San Casciano FC 15 1910 19929
San Godenzo FI 17 1167 21096
Tredozio FC 18 1212 22308
Pratovecchio Stia AR 18 5845 28153

Municipalities with at least 50000 inhabitants

An earthquake occurred to
37 Km SW of Forlì (117913 inhabitants)
40 Km S of Faenza (58541 inhabitants)
40 Km SW of Cesena (96758 inhabitants)
48 Km S of Imola (69797 inhabitants)
50 Km E of Firenze (382808 inhabitants)
52 Km N of Arezzo (99543 inhabitants)
56 Km E of Scandicci (50609 inhabitants)
59 Km E of Prato (191150 inhabitants)
60 Km W of Rimini (147750 inhabitants)
62 Km SW of Ravenna (159116 inhabitants)
73 Km E of Pistoia (90315 inhabitants)
74 Km SE of Bologna (386663 inhabitants)
79 Km NE of Siena (53903 inhabitants)
87 Km W of Pesaro (94582 inhabitants)
96 Km W of Fano (60888 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100 		ML 1.2 2019-08-18
08:23:01		 43.9312 11.8345 9 2019-08-18
08:29:58		 Sala Sismica INGV-Roma 71597621
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-08-18 08:23:01 ± 0.08
Latitude 43.9312 ± 0.0027
Longitude 11.8345 ± 0.0075
Depth (km) 9 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 71597621

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 577
Semi-minor axis of confidence ellipse (meter) 46
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) 580.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 143
Number of associated phases, regardless of their use for origin computation 15
Number of defining phases 15
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0.02788
Epicentral distance of station farthest from the epicenter (degree) 0.40559
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
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 71597621
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-08-18 08:29:58
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SEI.HHZ. 2019-08-18T08:23:15.72 0.3 undecidable manual S 290 40.3263 50 0.09 71
IV.CRE.HHZ. 2019-08-18T08:23:14.55 0.3 undecidable manual S 165 35.8419 50 0.11 72
IV.BRIS.HHZ. 2019-08-18T08:23:13.94 0.3 undecidable manual S 351 33.0447 104 0.29 69
IV.RUFI.EHZ. 2019-08-18T08:23:11.77 0.3 undecidable manual S 248 27.9498 107 -0.19 71
IV.PARC.HHZ. 2019-08-18T08:23:10.09 1.0 undecidable manual P 134 45.0216 50 -0.43 22
IV.SEI.HHZ. 2019-08-18T08:23:09.60 0.3 undecidable manual P 290 40.3263 50 -0.2 70
IV.LMD.HHZ. 2019-08-18T08:23:09.12 0.3 undecidable manual S 328 19.1697 114 0.03 75
IV.ASQU.HHZ. 2019-08-18T08:23:08.21 0.3 undecidable manual S 194 15.3735 119 0.3 71
IV.CRE.HHZ. 2019-08-18T08:23:08.96 0.1 undecidable manual P 165 35.8419 50 -0.15 95
IV.BRIS.HHZ. 2019-08-18T08:23:08.55 0.6 undecidable manual P 351 33.0447 104 -0.1 48
IV.RUFI.EHZ. 2019-08-18T08:23:07.62 0.1 undecidable manual P 248 27.9498 107 -0.06 98
IV.LMD.HHZ. 2019-08-18T08:23:06.00 0.1 undecidable manual P 328 19.1697 114 -0.02 100
IV.ASQU.HHZ. 2019-08-18T08:23:05.67 0.1 undecidable manual P 194 15.3735 119 0.33 94
IV.SFI.EHZ. 2019-08-18T08:23:04.69 0.1 undecidable manual S 161 3.0969 160 -0.27 98
IV.SFI.EHZ. 2019-08-18T08:23:03.66 0.3 undecidable manual P 161 3.0969 160 0.03 77
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ASQU.HHE. ML:1.0 0.00009675000000000001 0.16 AML other m 2019-08-18T08:23:08.72
IV.ASQU.HHN. ML:1.0 0.00009945 0.58 AML other m 2019-08-18T08:23:09.71
IV.LMD.HHN. ML:1.3 0.00015 0.44 AML other m 2019-08-18T08:23:09.60
IV.LMD.HHE. ML:1.4 0.0001795 0.64 AML other m 2019-08-18T08:23:10.38
IV.BRIS.HHE. ML:1.3 0.00009570000000000001 0.68 AML other m 2019-08-18T08:23:14.59
IV.BRIS.HHN. ML:1.2 0.00007489999999999999 0.2 AML other m 2019-08-18T08:23:14.85
IV.CRE.HHN. ML:1.2 0.00006405 0.3 AML other m 2019-08-18T08:23:14.82
IV.CRE.HHE. ML:0.9 0.0000287 1.04 AML other m 2019-08-18T08:23:16.72
IV.SEI.HHN. ML:1.8 0.00020400000000000003 0.4 AML other m 2019-08-18T08:23:16.35
IV.SEI.HHE. ML:1.3 0.00007680000000000001 0.3 AML other m 2019-08-18T08:23:16.57
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download