Earthquake with magnitude of ML 1.2 on date 21-05-2019 and time 11:43:05 (Italy) in region 4 km W Portico e San Benedetto (FC)

A magnitude ML 1.2 earthquake occured in region: 4 km W Portico e San Benedetto (FC), on

  • 21-05-2019 09:43:05 (UTC)
  • 21-05-2019 11:43:05 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.03, 11.73 at 7 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
Portico e San Benedetto FC 4 756 756
Tredozio FC 6 1212 1968
Premilcuore FC 7 799 2767
Rocca San Casciano FC 10 1910 4677
Marradi FI 11 3139 7816
San Godenzo FI 14 1167 8983
Galeata FC 15 2516 11499
Modigliana FC 15 4560 16059
Dovadola FC 16 1653 17712
Santa Sofia FC 17 4136 21848
Civitella di Romagna FC 17 3786 25634
Palazzuolo sul Senio FI 18 1154 26788

Municipalities with at least 50000 inhabitants

An earthquake occurred to
31 Km SW of Faenza (58541 inhabitants)
33 Km SW of Forlì (117913 inhabitants)
36 Km S of Imola (69797 inhabitants)
43 Km W of Cesena (96758 inhabitants)
48 Km NE of Firenze (382808 inhabitants)
53 Km NE of Scandicci (50609 inhabitants)
53 Km E of Prato (191150 inhabitants)
57 Km SW of Ravenna (159116 inhabitants)
61 Km SE of Bologna (386663 inhabitants)
64 Km N of Arezzo (99543 inhabitants)
66 Km E of Pistoia (90315 inhabitants)
67 Km W of Rimini (147750 inhabitants)
85 Km NE of Siena (53903 inhabitants)
90 Km S of Ferrara (133155 inhabitants)
94 Km SE of Modena (184973 inhabitants)
95 Km W of Pesaro (94582 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 1.2 2019-05-21
09:43:05
44.03 11.73 7 2019-05-21
09:50:42
Sala Sismica INGV-Roma 68753041
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-05-21 09:43:05 ± 0.07
Latitude 44.03 ± 0.00
Longitude 11.73 ± 0.01
Depth (km) 7 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 68753041

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 387
Semi-minor axis of confidence ellipse (meter) 85
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 85
Circular confidence region, given by single value of horizontal uncertainty (meter) 390
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 70
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 13
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.12
Epicentral distance of station closest to the epicenter (degree) 0.05306
Epicentral distance of station farthest from the epicenter (degree) 0.54139
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 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 68753041
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-05-21 09:50:42
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.BLLA.EHE. 2019-05-21T09:43:16.52 1.0 undecidable manual P 77 0.5414 50 -0.17 23
IV.RUFI.EHZ. 2019-05-21T09:43:15.37 0.6 undecidable manual S 220 0.2482 103 0.1 49
IV.ASQU.HHZ. 2019-05-21T09:43:14.78 0.6 undecidable manual S 170 0.2347 104 0.05 49
IV.IMOL.HNZ. 2019-05-21T09:43:13.14 0.1 undecidable manual P 1 0.3318 100 0.22 93
IV.BRIS.HHZ. 2019-05-21T09:43:13.44 0.3 undecidable manual S 7 0.1979 107 0.05 74
IV.RUFI.EHZ. 2019-05-21T09:43:11.16 0.1 positive manual P 220 0.2482 103 0.05 98
IV.SFI.HNZ. 2019-05-21T09:43:11.72 0.3 undecidable manual S 146 0.1475 112 0.17 73
IV.SEI.HHZ. 2019-05-21T09:43:11.47 1.0 negative manual P 276 0.2707 102 -0.11 24
IV.ASQU.HHZ. 2019-05-21T09:43:10.63 0.1 positive manual P 170 0.2347 104 -0.17 96
IV.BRIS.HHZ. 2019-05-21T09:43:09.94 0.1 positive manual P 7 0.1979 107 -0.08 99
IV.SFI.HNZ. 2019-05-21T09:43:08.90 0.1 undecidable manual P 146 0.1475 112 -0.06 100
IV.LMD.HHZ. 2019-05-21T09:43:08.42 0.3 undecidable manual S 340 0.0531 138 -0.06 76
IV.LMD.HHZ. 2019-05-21T09:43:07.07 0.6 undecidable manual P 340 0.0531 138 -0.12 50
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LMD.HHE. ML:0 0.00077634525 0.2048 AML other m 2019-05-21T09:43:08.60
IV.LMD.HHN. ML:0 0.00065511855 0.0832 AML other m 2019-05-21T09:43:08.69
IV.BRIS.HNE. ML:1.6 0.0002790742 0.1728 AML other m 2019-05-21T09:43:14.03
IV.BRIS.HNN. ML:1.5 0.0002359083 0.1856 AML other m 2019-05-21T09:43:14.12
IV.BRIS.HHE. ML:1.6 0.0003033799 0.2048 AML other m 2019-05-21T09:43:13.81
IV.BRIS.HHN. ML:1.5 0.00024717285 0.1984 AML other m 2019-05-21T09:43:14.12
IV.ASQU.HHE. ML:1 6.696636E-5 0.1984 AML other m 2019-05-21T09:43:15.08
IV.ASQU.HHN. ML:0.8 3.284632E-5 0.224 AML other m 2019-05-21T09:43:15.79
IV.RUFI.EHE. ML:1 5.46273265E-5 0.3392 AML other m 2019-05-21T09:43:15.94
IV.RUFI.EHN. ML:0.6 2.1318715E-5 0.3392 AML other m 2019-05-21T09:43:16.70
IV.SEI.HHE. ML:1 4.9206095E-5 0.1408 AML other m 2019-05-21T09:43:17.85
IV.SEI.HHN. ML:1.2 8.3684245E-5 0.1984 AML other m 2019-05-21T09:43:17.80
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