Earthquake with magnitude of ML 0.8 on date 04-08-2019 and time 02:49:57 (UTC) in region 4 km SW Palazzuolo sul Senio (FI)

A magnitude ML 0.8 earthquake occured in region: 4 km SW Palazzuolo sul Senio (FI), on

  • 04-08-2019 02:49:57 (UTC)
  • 04-08-2019 04:49:57 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.08, 11.51 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 4 1154 1154
Marradi FI 8 3139 4293
Firenzuola FI 11 4726 9019
Castel del Rio BO 15 1246 10265
Vicchio FI 17 8044 18309
Borgo San Lorenzo FI 17 18211 36520
Casola Valsenio RA 18 2617 39137
Tredozio FC 19 1212 40349
San Godenzo FI 19 1167 41516
Fontanelice BO 20 1943 43459

Municipalities with at least 50000 inhabitants

An earthquake occurred to
34 Km SW of Imola (69797 inhabitants)
37 Km SW of Faenza (58541 inhabitants)
40 Km NE of Prato (191150 inhabitants)
40 Km NE of Firenze (382808 inhabitants)
45 Km NE of Scandicci (50609 inhabitants)
45 Km W of Forlì (117913 inhabitants)
48 Km S of Bologna (386663 inhabitants)
50 Km E of Pistoia (90315 inhabitants)
59 Km W of Cesena (96758 inhabitants)
66 Km SW of Ravenna (159116 inhabitants)
75 Km NW of Arezzo (99543 inhabitants)
78 Km SE of Modena (184973 inhabitants)
84 Km S of Ferrara (133155 inhabitants)
84 Km W of Rimini (147750 inhabitants)
85 Km E of Lucca (89046 inhabitants)
86 Km N of Siena (53903 inhabitants)
92 Km SE of Carpi (70699 inhabitants)
98 Km E of Pisa (89158 inhabitants)
98 Km SE of Reggio nell'Emilia (171345 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 0.8 2019-08-04
02:49:57
44.08 11.51 10 2019-08-04
03:28:42
Sala Sismica INGV-Roma 71155881
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-08-04 02:49:57 ± 0.03
Latitude 44.08 ± 0.00
Longitude 11.51 ± 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 71155881

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 251
Semi-minor axis of confidence ellipse (meter) 78
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 354
Circular confidence region, given by single value of horizontal uncertainty (meter) 250
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 157
Number of associated phases, regardless of their use for origin computation 10
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.06
Epicentral distance of station closest to the epicenter (degree) 0.11421
Epicentral distance of station farthest from the epicenter (degree) 0.34894
Number of stations at which the event was observed 6
Number of stations from which data was used for origin computation 6
Magnitude information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.1
Num. used stations 6
Type of magnitude ML
Reference to an origin 71155881
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-08-04 03:28:42
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MOCL.EHZ. 2019-08-04T02:50:07.83 0.1 undecidable manual S 252 0.2509 50 0.01 98
IV.RUFI.EHZ. 2019-08-04T02:50:07.63 0.1 undecidable manual S 180 0.2446 50 -0.03 97
IV.ASQU.HHZ. 2019-08-04T02:50:05.32 0.1 undecidable manual P 145 0.3489 50 0.09 94
IV.LMD.HHZ. 2019-08-04T02:50:04.12 0.1 undecidable manual S 92 0.1403 123 -0.03 99
IV.RUFI.EHZ. 2019-08-04T02:50:03.47 0.3 undecidable manual P 180 0.2446 50 0.01 73
IV.BRIS.HHZ. 2019-08-04T02:50:03.25 0.1 undecidable manual P 52 0.2311 50 0.04 97
IV.SEI.HHZ. 2019-08-04T02:50:03.35 0.1 undecidable manual S 255 0.1142 129 0.02 100
IV.MOCL.EHZ. 2019-08-04T02:50:03.44 0.1 undecidable manual P 252 0.2509 50 -0.11 96
IV.LMD.HHZ. 2019-08-04T02:50:01.39 0.1 undecidable manual P 92 0.1403 123 -0.04 99
IV.SEI.HHZ. 2019-08-04T02:50:00.99 0.1 undecidable manual P 255 0.1142 129 0.03 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SEI.HHE. ML:1.4 0.000288 0.26 AML other m 2019-08-04T02:50:03.53
IV.SEI.HHN. ML:1.9 0.0009535 0.2 AML other m 2019-08-04T02:50:03.60
IV.LMD.HHN. ML:0.7 4.45E-5 0.26 AML other m 2019-08-04T02:50:04.39
IV.LMD.HHE. ML:0.7 4.555E-5 1.74 AML other m 2019-08-04T02:50:06.89
IV.MOCL.EHE. ML:0.8 3.065E-5 0.74 AML other m 2019-08-04T02:50:07.94
IV.MOCL.EHN. ML:0.8 3.53E-5 0.16 AML other m 2019-08-04T02:50:08.14
IV.BRIS.HHE. ML:0.9 4.725E-5 0.62 AML other m 2019-08-04T02:50:13.93
IV.BRIS.HHN. ML:0.8 4.055E-5 0.42 AML other m 2019-08-04T02:50:17.68
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