Earthquake with magnitude of ML 1.6 on date 21-03-2019 and time 20:34:10 (Italy) in region 6 km NW Palazzuolo sul Senio (FI)

A magnitude ML 1.6 earthquake occured in region: 6 km NW Palazzuolo sul Senio (FI), on

  • 21-03-2019 19:34:10 (UTC)
  • 21-03-2019 20:34:10 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.16, 11.52 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
Palazzuolo sul Senio FI 6 1154 1154
Castel del Rio BO 6 1246 2400
Casola Valsenio RA 11 2617 5017
Fontanelice BO 12 1943 6960
Marradi FI 12 3139 10099
Firenzuola FI 12 4726 14825
Borgo Tossignano BO 14 3288 18113
Casalfiumanese BO 17 3438 21551
Monghidoro BO 18 3749 25300

Municipalities with at least 50000 inhabitants

An earthquake occurred to
27 Km SW of Imola (69797 inhabitants)
32 Km W of Faenza (58541 inhabitants)
40 Km SE of Bologna (386663 inhabitants)
42 Km W of Forlì (117913 inhabitants)
46 Km NE of Prato (191150 inhabitants)
48 Km NE of Firenze (382808 inhabitants)
52 Km NE of Scandicci (50609 inhabitants)
54 Km E of Pistoia (90315 inhabitants)
58 Km W of Cesena (96758 inhabitants)
61 Km W of Ravenna (159116 inhabitants)
72 Km SE of Modena (184973 inhabitants)
76 Km S of Ferrara (133155 inhabitants)
82 Km NW of Arezzo (99543 inhabitants)
84 Km W of Rimini (147750 inhabitants)
86 Km SE of Carpi (70699 inhabitants)
89 Km E of Lucca (89046 inhabitants)
93 Km SE of Reggio nell'Emilia (171345 inhabitants)
95 Km N of Siena (53903 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 1.6 2019-03-21
19:34:10
44.16 11.52 8 2019-03-21
19:43:37
Sala Sismica INGV-Roma 66772261
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-03-21 19:34:10 ± 0.24
Latitude 44.16 ± 0.01
Longitude 11.52 ± 0.02
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 66772261

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1124
Semi-minor axis of confidence ellipse (meter) 1014
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 80
Circular confidence region, given by single value of horizontal uncertainty (meter) 1120
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 249
Number of associated phases, regardless of their use for origin computation 22
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.18
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 1.15293
Number of stations at which the event was observed 17
Number of stations from which data was used for origin computation 5
Magnitude information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.6
Num. used stations 8
Type of magnitude ML
Reference to an origin 66772261
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-03-21 19:43:37
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CAFE.HHZ. 2019-03-21T19:35:58.20 3.0 undecidable manual Sg 5.56 0
IV.PAOL.HHZ. 2019-03-21T19:35:55.91 3.0 undecidable manual Sg 10.23 0
IV.MTGR.HHZ. 2019-03-21T19:35:54.31 3.0 negative manual Pg 15.39 0
IT.VNF1.HGZ. 2019-03-21T19:35:34.52 3.0 undecidable manual Sg 3.1 0
IV.MILN.HNZ. 2019-03-21T19:35:22.43 3.0 undecidable manual Sn 1.75 0
IV.SAMA.HHZ. 2019-03-21T19:35:17.47 3.0 undecidable manual Sg 2.04 0
IV.CRTO.HHZ. 2019-03-21T19:35:12.04 3.0 negative manual Pg 7.5 0
IV.LRP.EHZ. 2019-03-21T19:34:44.91 3.0 undecidable manual Pn -5.64 0
IV.FIR.HHZ. 2019-03-21T19:34:29.40 3.0 undecidable manual S -2.49 0
IV.ASQU.HHZ. 2019-03-21T19:34:25.67 1.0 undecidable manual S 152 0.411 50 0.16 23
IV.SFI.EHZ. 2019-03-21T19:34:23.64 0.3 undecidable manual S 137 0.3462 50 0.04 73
IV.RUFI.EHZ. 2019-03-21T19:34:23.26 0.6 undecidable manual S 181 0.3211 50 0.41 45
IV.MURB.HNZ. 2019-03-21T19:34:22.63 3.0 undecidable manual P 1.1529 -9.13 0
IV.FIU.EHZ. 2019-03-21T19:34:21.46 3.0 negative manual P -1.63 0
IV.ASQU.HHZ. 2019-03-21T19:34:19.00 0.3 undecidable manual P 152 0.411 50 -0.07 72
IV.BRIS.HHZ. 2019-03-21T19:34:18.23 0.3 undecidable manual S 70 0.1889 112 0.13 74
IV.NARO.HHZ. 2019-03-21T19:34:18.20 3.0 positive manual P 0.9407 -9.93 0
IV.RUFI.EHZ. 2019-03-21T19:34:17.54 1.0 negative manual P 181 0.3211 50 0 25
IV.SFI.EHZ. 2019-03-21T19:34:17.64 0.1 undecidable manual P 137 0.3462 50 -0.33 92
IV.LMD.HHZ. 2019-03-21T19:34:16.92 0.6 undecidable manual S 121 0.1574 116 -0.08 50
IV.BRIS.HHZ. 2019-03-21T19:34:14.85 0.1 positive manual P 70 0.1889 112 0.06 100
IV.LMD.HHZ. 2019-03-21T19:34:14.15 0.6 negative manual P 121 0.1574 116 -0.01 51
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LMD.HHN. ML:0.9 6.66E-5 1.42 AML other m 2019-03-21T19:34:16.22
IV.LMD.HHE. ML:0.8 5.81E-5 1.78 AML other m 2019-03-21T19:34:18.93
IV.BRIS.HHN. ML:1.3 0.0001423 0.3 AML other m 2019-03-21T19:34:18.43
IV.BRIS.HHE. ML:1.2 0.0001056 0.46 AML other m 2019-03-21T19:34:21.38
IV.FIR.HNE. ML:2.2 0.0004125 0.88 AML other m 2019-03-21T19:34:42.83
IV.FIR.HHE. ML:2.2 0.000399 1.02 AML other m 2019-03-21T19:34:42.90
IV.FIR.HHN. ML:2.2 0.0004365 0.94 AML other m 2019-03-21T19:34:42.15
IV.FIR.HNN. ML:2.2 0.000432 1 AML other m 2019-03-21T19:34:43.11
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