Earthquake with magnitude of ML 0.7 on date 21-09-2019 and time 18:39:31 (UTC) 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) 44.09, 11.49 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
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
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 0.7 2019-09-21
18:39:31
44.09 11.49 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 44.09 ± 0.01
Longitude 11.49 ± 0.00
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
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
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 Takeoff_angle Residual Weight
IV.ASQU.HHZ. 2019-09-21T18:39:44.92 0.3 undecidable manual S 143 0.3624 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 0.25 50 -0.06 73
IV.MOCL.EHZ. 2019-09-21T18:39:40.83 0.3 undecidable manual S 250 0.2365 50 -0.09 73
IV.SFI.EHZ. 2019-09-21T18:39:38.24 0.3 undecidable manual P 125 0.3157 50 0.06 72
IV.ASQU.HHZ. 2019-09-21T18:39:38.90 0.3 undecidable manual P 143 0.3624 50 -0.08 71
IV.LMD.HHZ. 2019-09-21T18:39:38.16 0.3 undecidable manual S 94 0.1574 120 -0.02 75
IV.BRIS.HHZ. 2019-09-21T18:39:37.02 0.3 undecidable manual P 55 0.2419 50 0.12 73
IV.MOCL.EHZ. 2019-09-21T18:39:36.79 0.3 undecidable manual P 250 0.2365 50 -0.03 74
IV.SEI.HHZ. 2019-09-21T18:39:36.44 0.3 undecidable manual S 250 0.0989 132 0.08 75
IV.RUFI.EHZ. 2019-09-21T18:39:36.90 0.3 undecidable manual P 177 0.25 50 -0.16 72
IV.LMD.HHZ. 2019-09-21T18:39:35.03 0.3 undecidable manual P 94 0.1574 120 -0.2 72
IV.SEI.HHZ. 2019-09-21T18:39:34.27 0.1 undecidable manual P 250 0.0989 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 0.00023396675 0.1792 AML other m 2019-09-21T18:39:36.63
IV.SEI.HHN. ML:1.7 0.0006109041 0.1792 AML other m 2019-09-21T18:39:36.81
IV.LMD.HHE. ML:0.6 3.294459E-5 0.2816 AML other m 2019-09-21T18:39:38.10
IV.LMD.HHN. ML:0.4 2.18728495E-5 0.32 AML other m 2019-09-21T18:39:38.57
IV.MOCL.EHE. ML:0.6 2.220374E-5 0.2944 AML other m 2019-09-21T18:39:41.19
IV.MOCL.EHN. ML:0.7 3.057231E-5 0.3328 AML other m 2019-09-21T18:39:41.04
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