Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 28-11-2020 and time 21:44:50 (Italy) in region 7 km E San Severo (FG)

A magnitude ML 1.2 earthquake occured in region: 7 km E San Severo (FG), on

  • 28-11-2020 20:44:50 (UTC)
  • 28-11-2020 21:44:50 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 41.71, 15.46 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.

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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
San Severo FG 7 53905 53905
Apricena FG 9 13328 67233
Rignano Garganico FG 11 2117 69350
San Marco in Lamis FG 15 13831 83181
Torremaggiore FG 15 17311 100492
Poggio Imperiale FG 15 2724 103216
San Nicandro Garganico FG 17 15566 118782
San Paolo di Civitate FG 18 5818 124600
Lesina FG 20 6410 131010

Municipalities with at least 50000 inhabitants

An earthquake occurred to
7 Km E of San Severo (53905 inhabitants)
28 Km N of Foggia (151991 inhabitants)
39 Km W of Manfredonia (57279 inhabitants)
61 Km NW of Cerignola (58396 inhabitants)
80 Km NW of Barletta (94814 inhabitants)
86 Km NE of Benevento (60091 inhabitants)
87 Km NW of Andria (100440 inhabitants)
93 Km NW of Trani (56217 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web 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
Reviewed
Rev100 		ML 1.2 2020-11-28
20:44:50		 41.71 15.47 8 2020-11-28
20:54:38		 Sala Sismica INGV-Roma 85073201
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-11-28 20:44:50 ± 0.14
Latitude 41.71 ± 0.01
Longitude 15.47 ± 0.01
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 85073201

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 777
Semi-minor axis of confidence ellipse (meter) 577
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 182
Circular confidence region, given by single value of horizontal uncertainty (meter) 780
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 156
Number of associated phases, regardless of their use for origin computation 26
Number of defining phases 13
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.23
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.33185
Number of stations at which the event was observed 21
Number of stations from which data was used for origin computation 8
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 85073201
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-11-28 20:54:38
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CAGR.HHZ. 2020-11-28T20:46:40.61 3.0 undecidable manual Sn -1.92 0
IV.IMI.HHZ. 2020-11-28T20:46:34.53 3.0 undecidable manual Pg 17.540001 0
IV.MOCL.EHZ. 2020-11-28T20:46:34.17 3.0 undecidable manual Sn 0.79 0
IV.MNTV.HNZ. 2020-11-28T20:46:12.43 3.0 undecidable manual Pg 11.64 0
IV.PIPA.HHZ. 2020-11-28T20:46:09.10 3.0 undecidable manual Sg 8.28 0
XK.GIZZ.HHZ. 2020-11-28T20:46:08.26 3.0 undecidable manual Sn -0.93 0
IV.PE3.EHZ. 2020-11-28T20:46:07.99 3.0 undecidable manual Sn -2.21 0
IV.PII.HHZ. 2020-11-28T20:45:54.80 3.0 positive manual Pn 3.1 0
CR.STON.BHZ. 2020-11-28T20:45:47.56 3.0 undecidable manual Sn -0.07 0
IV.CET2.HHZ. 2020-11-28T20:45:33.13 3.0 undecidable manual Pg 6.63 0
IV.PZUN.HHZ. 2020-11-28T20:45:14.54 3.0 positive manual P 3.38 0
IX.MNT3.HHZ.02 2020-11-28T20:45:09.24 3.0 undecidable manual P 0.25 0
IV.MELA.HHZ. 2020-11-28T20:45:00.80 0.6 undecidable manual S 270 0.2527 106 0.25 47
IV.SGRT.HHZ. 2020-11-28T20:44:59.02 0.6 undecidable manual S 77 0.2131 109 -0.1 49
OT.OT07.EHZ. 2020-11-28T20:44:59.03 0.3 undecidable manual S 114 0.2077 109 0.12 73
IV.MSAG.HHN. 2020-11-28T20:44:57.84 0.6 undecidable manual P 89 0.3318 50 -0.08 48
IV.MELA.HHZ. 2020-11-28T20:44:56.01 0.3 undecidable manual P 270 0.2527 106 -0.27 70
OT.OT07.EHZ. 2020-11-28T20:44:55.36 0.3 undecidable manual P 114 0.2077 109 0.03 74
OT.OT05.EHZ. 2020-11-28T20:44:55.47 0.3 undecidable manual S 114 0.1124 123 -0.13 74
IV.SGRT.HHZ. 2020-11-28T20:44:55.44 0.3 undecidable manual P 77 0.2131 109 -0.01 74
IV.APRC.HHZ. 2020-11-28T20:44:54.40 0.3 undecidable manual S 48 0.0782 133 -0.14 74
OT.OT03.EHZ. 2020-11-28T20:44:54.13 0.3 undecidable manual P 87 0.1376 118 0.23 72
OT.OT06.EHZ. 2020-11-28T20:44:53.64 0.3 undecidable manual P 102 0.0989 126 0.48 69
IV.APRC.HHZ. 2020-11-28T20:44:52.90 0.1 undecidable manual P 48 0.0782 133 0.1 100
OT.OT05.EHZ. 2020-11-28T20:44:52.92 0.3 undecidable manual P 114 0.1124 123 -0.49 68
IV.MCLF.HNZ. 2020-11-28T20:44:50.68 3.0 undecidable manual P 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.APRC.HHE. ML:1.2 0.000264 1.76 AML other m 2020-11-28T20:44:55.09
IV.APRC.HHN. ML:1.4 0.000418 1.68 AML other m 2020-11-28T20:44:55.96
IV.SGRT.HHE. ML:1 7.188204E-5 1.2544 AML other m 2020-11-28T20:45:00.17
IV.SGRT.HHN. ML:0.8 4.08557E-5 2.6112 AML other m 2020-11-28T20:44:58.73
IV.MELA.HHE. ML:1.2 8.825594E-5 4.4288 AML other m 2020-11-28T20:45:00.65
IV.MELA.HHN. ML:1.2 8.499473E-5 0.704 AML other m 2020-11-28T20:45:01.23
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