Earthquake with magnitude of ML 0.9 on date 21-10-2021 and time 01:09:55 (Italy) in region 3 km N San Nicandro Garganico (FG)

A magnitude ML 0.9 earthquake occured in region: 3 km N San Nicandro Garganico (FG), on

  • 20-10-2021 23:09:55 (UTC)
  • 21-10-2021 01:09:55 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.866, 15.566 at 22 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
San Nicandro Garganico FG 3 15566 15566
Apricena FG 13 13328 28894
Poggio Imperiale FG 17 2724 31618
Lesina FG 17 6410 38028
Cagnano Varano FG 18 7330 45358
San Marco in Lamis FG 18 13831 59189

Municipalities with at least 50000 inhabitants

An earthquake occurred to
25 Km NE of San Severo (53905 inhabitants)
39 Km NW of Manfredonia (57279 inhabitants)
45 Km N of Foggia (151991 inhabitants)
72 Km NW of Cerignola (58396 inhabitants)
85 Km NW of Barletta (94814 inhabitants)
93 Km NW of Andria (100440 inhabitants)
97 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 0.9 2021-10-20
23:09:55
41.8657 15.5662 22 2021-10-20
23:18:50
Sala Sismica INGV-Roma 96813721
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-20 23:09:55 ± 0.2
Latitude 41.8657 ± 0.0108
Longitude 15.5662 ± 0.0109
Depth (km) 22 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 96813721

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1072
Semi-minor axis of confidence ellipse (meter) 925
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 316
Circular confidence region, given by single value of horizontal uncertainty (meter) 1070
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 254
Number of associated phases, regardless of their use for origin computation 25
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.17
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.34534
Number of stations at which the event was observed 17
Number of stations from which data was used for origin computation 11
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.2
Num. used stations 7
Type of magnitude ML
Reference to an origin 96813721
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-20 23:18:50
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.JOPP.HNZ. 2021-10-20T23:11:23.15 3.0 undecidable manual Sn -0.48 0
IV.FIR.HHZ. 2021-10-20T23:11:22.84 3.0 undecidable manual Sn -6.04 0
IV.CPGN.EHZ. 2021-10-20T23:11:14.31 3.0 undecidable manual Sg 0.56 0
IV.EL6.EHZ. 2021-10-20T23:10:57.67 3.0 undecidable manual Sg 1.95 0
IV.RIBO.EHZ.01 2021-10-20T23:10:42.39 3.0 undecidable manual Pn -1.79 0
IV.EL6.EHZ. 2021-10-20T23:10:27.29 3.0 undecidable manual Pg -0.89 0
IX.NSC3.EHZ.02 2021-10-20T23:10:24.21 3.0 undecidable manual Sn -4.42 0
OT.OT14.EHZ. 2021-10-20T23:10:05.93 0.6 undecidable manual S 83 0.2554 120 -0.29 62
IV.SGRT.HHZ. 2021-10-20T23:10:04.44 0.6 undecidable manual S 130 0.1727 132 0.2 64
OT.OT06.EHN. 2021-10-20T23:10:04.49 0.3 undecidable manual S 173 0.1817 131 0.07 99
OT.OT05.EHZ. 2021-10-20T23:10:04.41 0.6 undecidable manual S 173 0.2086 126 -0.64 57
OT.OT03.EHN. 2021-10-20T23:10:04.23 0.3 undecidable manual S 158 0.1655 134 0.15 98
OT.OT04.EHZ. 2021-10-20T23:10:03.62 0.3 undecidable manual S 176 0.1466 138 -0.07 100
IV.APRC.HHZ. 2021-10-20T23:10:03.13 0.3 undecidable manual S 189 0.1097 146 0.12 99
IV.MELA.HHZ. 2021-10-20T23:10:03.53 0.1 undecidable manual S -0.06 2.5
OT.OT12.EHE. 2021-10-20T23:10:03.16 0.6 undecidable manual P 132 0.3453 111 0.11 63
IV.MSAG.HHZ. 2021-10-20T23:10:02.36 0.6 undecidable manual P 121 0.2986 115 0.06 64
OT.OT14.EHZ. 2021-10-20T23:10:01.57 0.3 negative manual P 83 0.2554 120 -0.08 98
OT.OT07.EHN. 2021-10-20T23:10:01.87 0.6 undecidable manual P 155 0.2698 118 0.01 65
OT.OT05.EHZ. 2021-10-20T23:10:00.56 0.6 undecidable manual P 173 0.2086 126 -0.41 62
OT.OT03.EHN. 2021-10-20T23:10:00.52 0.3 undecidable manual P 158 0.1655 134 0.11 98
IV.SGRT.HHZ. 2021-10-20T23:10:00.62 0.3 negative manual P 130 0.1727 132 0.12 97
OT.OT06.EHN. 2021-10-20T23:10:00.72 0.3 undecidable manual P 173 0.1817 131 0.11 97
OT.OT04.EHZ. 2021-10-20T23:10:00.19 0.3 undecidable manual P 176 0.1466 138 0 100
IV.APRC.HHZ. 2021-10-20T23:09:59.94 1.0 positive manual P 189 0.1097 146 0.14 33
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
OT.OT05.EHE. ML:0 1.98172895E-6 0.1792 AML other m 2021-10-20T23:10:05.27
OT.OT05.EHN. ML:0.9 3.5226385E-5 0.1792 AML other m 2021-10-20T23:10:05.77
IV.SGRT.HHE. ML:0.7 2.9415466E-5 0.256 AML other m 2021-10-20T23:10:04.73
IV.SGRT.HHN. ML:0.7 2.9209E-5 0.1792 AML other m 2021-10-20T23:10:05.44
IV.MSAG.HHE. ML:0.7 1.884447E-5 0.9088 AML other m 2021-10-20T23:10:13.55
IV.MSAG.HHN. ML:1 3.444032E-5 0.7424 AML other m 2021-10-20T23:10:04.95
IV.MSAG.HNE. ML:1.1 5.1822905E-5 0.8192 AML other m 2021-10-20T23:10:14.00
IV.MSAG.HNN. ML:1.4 9.909662E-5 1.024 AML other m 2021-10-20T23:10:12.31
IV.EL6.EHE. ML:2.6 6.8617565E-5 0.4352 AML other m 2021-10-20T23:11:02.37
IV.EL6.EHN. ML:2.5 5.59412E-5 0.3968 AML other m 2021-10-20T23:10:31.26
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