Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 03-03-2021 and time 09:40:39 (UTC) in region 2 km W San Marco in Lamis (FG)

A magnitude ML 1.5 earthquake occured in region: 2 km W San Marco in Lamis (FG), on

  • 03-03-2021 09:40:39 (UTC)
  • 03-03-2021 10:40:39 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 41.72, 15.61 at 23 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 Marco in Lamis FG 2 13831 13831
Rignano Garganico FG 5 2117 15948
San Giovanni Rotondo FG 10 27184 43132
San Nicandro Garganico FG 14 15566 58698
Apricena FG 16 13328 72026
Cagnano Varano FG 18 7330 79356
San Severo FG 20 53905 133261

Municipalities with at least 50000 inhabitants

An earthquake occurred to
20 Km E of San Severo (53905 inhabitants)
27 Km W of Manfredonia (57279 inhabitants)
29 Km N of Foggia (151991 inhabitants)
56 Km NW of Cerignola (58396 inhabitants)
71 Km NW of Barletta (94814 inhabitants)
79 Km NW of Andria (100440 inhabitants)
83 Km NW of Trani (56217 inhabitants)
91 Km NW of Bisceglie (55422 inhabitants)
95 Km NE of Benevento (60091 inhabitants)
100 Km NW of Molfetta (59874 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
Reviewed
Rev100 		ML 1.5 2021-03-03
09:40:39		 41.72 15.61 23 2021-03-03
09:46:48		 Sala Sismica INGV-Roma 87654301
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-03-03 09:40:39 ± 0.14
Latitude 41.72 ± 0.01
Longitude 15.61 ± 0.01
Depth (km) 23 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 87654301

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 591
Semi-minor axis of confidence ellipse (meter) 227
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 38
Circular confidence region, given by single value of horizontal uncertainty (meter) 590
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 65
Number of associated phases, regardless of their use for origin computation 20
Number of defining phases 19
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) 0.41099
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 10
Magnitude information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 87654301
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-03-03 09:46:48
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MRVN.HHZ. 2021-03-03T09:40:54.62 3.0 negative manual P 0.01 0
IV.TREM.HNN. 2021-03-03T09:40:54.40 0.6 undecidable manual S 349 0.411 110 0.04 46
IV.MELA.HHZ. 2021-03-03T09:40:52.90 0.6 undecidable manual S 268 0.3633 113 -0.16 46
OT.OT14.EHZ. 2021-03-03T09:40:50.60 0.6 undecidable manual S 51 0.2815 120 -0.27 45
OT.OT12.EHZ. 2021-03-03T09:40:49.56 0.6 undecidable manual S 112 0.2365 125 -0.19 46
IV.MSAG.HHZ. 2021-03-03T09:40:49.35 0.6 undecidable manual S 92 0.2212 128 -0.03 48
IV.TREM.HNN. 2021-03-03T09:40:47.64 0.1 undecidable manual P 349 0.411 110 -0.29 88
IV.MELA.HHZ. 2021-03-03T09:40:47.59 1.0 positive manual P 268 0.3633 113 0.41 22
OT.OT07.EHZ. 2021-03-03T09:40:47.06 0.6 undecidable manual S 141 0.1259 145 -0.36 45
IV.APRC.HHZ. 2021-03-03T09:40:46.73 0.6 undecidable manual S 306 0.0648 161 0.13 49
OT.OT14.EHZ. 2021-03-03T09:40:46.05 0.1 undecidable manual P 51 0.2815 120 0.14 93
OT.OT05.EHZ. 2021-03-03T09:40:46.62 0.6 undecidable manual S 188 0.0612 162 0.06 50
IV.SGRT.HHZ. 2021-03-03T09:40:46.96 0.6 undecidable manual S 70 0.1034 151 -0.1 48
OT.OT12.EHZ. 2021-03-03T09:40:45.05 0.1 undecidable manual P 112 0.2365 125 -0.22 92
IV.MSAG.HHZ. 2021-03-03T09:40:45.35 0.1 undecidable manual P 92 0.2212 128 0.3 92
OT.OT07.EHZ. 2021-03-03T09:40:44.12 0.1 undecidable manual P 141 0.1259 145 0.2 95
IV.SGRT.HHZ. 2021-03-03T09:40:43.99 0.1 undecidable manual P 70 0.1034 151 0.27 94
IV.APRC.HHZ. 2021-03-03T09:40:43.44 0.1 undecidable manual P 306 0.0648 161 -0.01 100
OT.OT06.EHZ. 2021-03-03T09:40:43.36 0.1 undecidable manual P 203 0.0369 169 0.04 100
OT.OT05.EHZ. 2021-03-03T09:40:43.30 0.1 undecidable manual P 188 0.0612 162 -0.12 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
OT.OT05.EHE. ML:1.7 0.000323 0.24 AML other m 2021-03-03T09:40:46.62
IV.APRC.HHE. ML:1.5 0.000217 1.48 AML other m 2021-03-03T09:40:46.11
IV.APRC.HHN. ML:1.5 0.0002175 0.66 AML other m 2021-03-03T09:40:47.35
OT.OT05.EHN. ML:1.6 0.0002945 1.84 AML other m 2021-03-03T09:40:47.07
IV.SGRT.HHN. ML:1.2 0.0001035 1.08 AML other m 2021-03-03T09:40:47.77
IV.SGRT.HHE. ML:1.3 0.0001265 1.86 AML other m 2021-03-03T09:40:48.94
OT.OT12.EHN. ML:1.6 0.0001725 0.3 AML other m 2021-03-03T09:40:49.93
OT.OT12.EHE. ML:1.3 8.845E-5 1.7 AML other m 2021-03-03T09:40:50.86
IV.MSAG.HHE. ML:1.1 5.77E-5 0.46 AML other m 2021-03-03T09:40:50.11
IV.MSAG.HHN. ML:1.4 0.00012 0.24 AML other m 2021-03-03T09:40:50.63
IV.MELA.HNE. ML:1.6 0.00012209069 1.8944 AML other m 2021-03-03T09:40:53.95
IV.MELA.HNN. ML:1.4 8.141002E-5 0.5312 AML other m 2021-03-03T09:40:53.13
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