Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.7 on date 21-09-2019 and time 20:39:31 (Italy) in region 6 km SW Palazzuolo sul Senio (FI)

A magnitude ML 0.7 earthquake occured in region: 6 km SW Palazzuolo sul Senio (FI), on

  • 21-09-2019 18:39:31 (UTC)
  • 21-09-2019 20:39:31 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.0880, 11.4890 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.

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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
Palazzuolo sul Senio FI 6 1154 1154
Firenzuola FI 9 4726 5880
Marradi FI 10 3139 9019
Castel del Rio BO 14 1246 10265
Borgo San Lorenzo FI 17 18211 28476
Vicchio FI 17 8044 36520
Casola Valsenio RA 19 2617 39137
Scarperia e San Piero FI 19 12217 51354
Fontanelice BO 20 1943 53297

Municipalities with at least 50000 inhabitants

An earthquake occurred to
35 Km SW of Imola (69797 inhabitants)
39 Km SW of Faenza (58541 inhabitants)
39 Km NE of Prato (191150 inhabitants)
40 Km NE of Firenze (382808 inhabitants)
44 Km NE of Scandicci (50609 inhabitants)
47 Km W of Forlì (117913 inhabitants)
47 Km S of Bologna (386663 inhabitants)
49 Km E of Pistoia (90315 inhabitants)
61 Km W of Cesena (96758 inhabitants)
68 Km SW of Ravenna (159116 inhabitants)
76 Km NW of Arezzo (99543 inhabitants)
77 Km SE of Modena (184973 inhabitants)
83 Km E of Lucca (89046 inhabitants)
84 Km S of Ferrara (133155 inhabitants)
86 Km W of Rimini (147750 inhabitants)
86 Km N of Siena (53903 inhabitants)
91 Km SE of Carpi (70699 inhabitants)
96 Km SE of Reggio nell'Emilia (171345 inhabitants)
96 Km E of Pisa (89158 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 0.7 2019-09-21
18:39:31		 44.088 11.4887 10 2019-09-21
18:51:21		 Sala Sismica INGV-Roma 72622561
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-09-21 18:39:31 ± 0.06
Latitude 44.0880 ± 0.0054
Longitude 11.4887 ± 0.0038
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 72622561

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 542
Semi-minor axis of confidence ellipse (meter) 126
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 355
Circular confidence region, given by single value of horizontal uncertainty (meter) 540.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 165
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) 0.13
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.36243
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 7
Magnitude information

ML:0.7

Field Value
Value 0.7
Uncertainty 0.4
Num. used stations 6
Type of magnitude ML
Reference to an origin 72622561
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-09-21 18:51:21
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ASQU.HHZ. 2019-09-21T18:39:44.92 0.3 undecidable manual S 143 40.2264 50 0.25 69
IV.CRMI.HHZ. 2019-09-21T18:39:42.41 3.0 undecidable manual P 0
IV.RUFI.EHZ. 2019-09-21T18:39:41.28 0.3 undecidable manual S 177 27.75 50 -0.06 73
IV.MOCL.EHZ. 2019-09-21T18:39:40.83 0.3 undecidable manual S 250 26.2515 50 -0.09 73
IV.ASQU.HHZ. 2019-09-21T18:39:38.90 0.3 undecidable manual P 143 40.2264 50 -0.08 71
IV.LMD.HHZ. 2019-09-21T18:39:38.16 0.3 undecidable manual S 94 17.4714 120 -0.02 75
IV.SFI.EHZ. 2019-09-21T18:39:38.24 0.3 undecidable manual P 125 35.0427 50 0.06 72
IV.BRIS.HHZ. 2019-09-21T18:39:37.02 0.3 undecidable manual P 55 26.8509 50 0.12 73
IV.SEI.HHZ. 2019-09-21T18:39:36.44 0.3 undecidable manual S 250 10.9779 132 0.08 75
IV.RUFI.EHZ. 2019-09-21T18:39:36.90 0.3 undecidable manual P 177 27.75 50 -0.16 72
IV.MOCL.EHZ. 2019-09-21T18:39:36.79 0.3 undecidable manual P 250 26.2515 50 -0.03 74
IV.LMD.HHZ. 2019-09-21T18:39:35.03 0.3 undecidable manual P 94 17.4714 120 -0.2 72
IV.SEI.HHZ. 2019-09-21T18:39:34.27 0.1 undecidable manual P 250 10.9779 132 0.09 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SEI.HHE. ML:1.3 0.00023396675000000001 0.1792 AML other m 2019-09-21T18:39:36.63
IV.SEI.HHN. ML:1.7 0.0006109040999999999 0.1792 AML other m 2019-09-21T18:39:36.81
IV.LMD.HHE. ML:0.6 0.000032944589999999996 0.2816 AML other m 2019-09-21T18:39:38.10
IV.LMD.HHN. ML:0.4 0.0000218728495 0.32 AML other m 2019-09-21T18:39:38.57
IV.MOCL.EHE. ML:0.6 0.000022203739999999998 0.2944 AML other m 2019-09-21T18:39:41.19
IV.MOCL.EHN. ML:0.7 0.00003057231 0.3328 AML other m 2019-09-21T18:39:41.04
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