Earthquake with magnitude of ML 1.5 on date 20-10-2021 and time 03:36:25 (Italy) in region Costa Garganica (Foggia)

A magnitude ML 1.5 earthquake occured in region: Costa Garganica (Foggia), on

  • 20-10-2021 01:36:25 (UTC)
  • 20-10-2021 03:36:25 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.979, 15.817 at 27 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
Rodi Garganico FG 8 3693 3693
Ischitella FG 11 4432 8125
Vico del Gargano FG 15 7766 15891
Carpino FG 15 4182 20073
Peschici FG 17 4521 24594
Cagnano Varano FG 17 7330 31924

Municipalities with at least 50000 inhabitants

An earthquake occurred to
40 Km N of Manfredonia (57279 inhabitants)
49 Km NE of San Severo (53905 inhabitants)
62 Km NE of Foggia (151991 inhabitants)
80 Km N of Cerignola (58396 inhabitants)
83 Km NW of Barletta (94814 inhabitants)
93 Km NW of Andria (100440 inhabitants)
93 Km NW of Trani (56217 inhabitants)
100 Km NW of Bisceglie (55422 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 1.5 2021-10-20
01:36:25
41.9788 15.8172 27 2021-10-20
01:42:08
Sala Sismica INGV-Roma 96779091
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-20 01:36:25 ± 0.19
Latitude 41.9788 ± 0.0054
Longitude 15.8172 ± 0.0097
Depth (km) 27 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 96779091

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 763
Semi-minor axis of confidence ellipse (meter) 233
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 241
Circular confidence region, given by single value of horizontal uncertainty (meter) 760
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 168
Number of associated phases, regardless of their use for origin computation 16
Number of defining phases 16
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.24
Epicentral distance of station closest to the epicenter (degree) 0.10612
Epicentral distance of station farthest from the epicenter (degree) 0.35703
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:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 96779091
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-20 01:42:08
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
OT.OT12.EHZ. 2021-10-20T01:36:39.67 0.6 undecidable manual S 169 0.3534 118 -0.24 47
OT.OT05.EHZ. 2021-10-20T01:36:39.60 0.3 undecidable manual S 207 0.357 118 -0.41 67
IV.MSAG.HHZ. 2021-10-20T01:36:38.11 0.3 undecidable manual S 166 0.2752 126 0.16 72
OT.OT13.EHZ. 2021-10-20T01:36:38.11 0.3 undecidable manual S 110 0.2869 124 -0.11 74
IV.APRC.HHZ. 2021-10-20T01:36:38.47 0.3 undecidable manual S 223 0.3013 123 -0.1 73
IV.TREM.HHZ. 2021-10-20T01:36:37.69 0.3 undecidable manual S 302 0.2698 126 -0.12 73
IV.SGRT.HHZ. 2021-10-20T01:36:36.80 0.3 undecidable manual S 194 0.2311 131 -0.11 74
OT.OT14.EHZ. 2021-10-20T01:36:34.77 0.3 undecidable manual S 141 0.1061 154 0.16 74
OT.OT12.EHZ. 2021-10-20T01:36:34.13 0.3 negative manual P 169 0.3534 118 0.14 72
OT.OT05.EHZ. 2021-10-20T01:36:33.67 1.0 positive manual P 207 0.357 118 -0.38 23
IV.APRC.HHZ. 2021-10-20T01:36:33.81 0.1 undecidable manual P 223 0.3013 123 0.59 87
IV.SGRT.HHZ. 2021-10-20T01:36:32.40 0.3 negative manual P 194 0.2311 131 0.14 73
IV.TREM.HHZ. 2021-10-20T01:36:32.60 0.1 undecidable manual P 302 0.2698 126 -0.18 96
IV.MSAG.HHZ. 2021-10-20T01:36:32.99 0.6 negative manual P 166 0.2752 126 0.13 48
OT.OT13.EHZ. 2021-10-20T01:36:32.74 0.1 undecidable manual P 110 0.2869 124 -0.27 94
OT.OT14.EHZ. 2021-10-20T01:36:31.04 0.1 negative manual P 141 0.1061 154 0.11 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SGRT.HHN. ML:1.4 0.000108 0.12 AML other m 2021-10-20T01:36:37.07
IV.SGRT.HHE. ML:1.4 9.78E-5 0.18 AML other m 2021-10-20T01:36:37.12
IV.MSAG.HHN. ML:1.3 7.72E-5 1.08 AML other m 2021-10-20T01:36:38.24
OT.OT13.EHN. ML:2 0.000358 0.32 AML other m 2021-10-20T01:36:38.79
IV.MSAG.HHE. ML:1 3.64E-5 0.98 AML other m 2021-10-20T01:36:39.04
IV.APRC.HHN. ML:1.5 9.45E-5 0.12 AML other m 2021-10-20T01:36:39.13
IV.APRC.HHE. ML:1.4 8.63E-5 0.34 AML other m 2021-10-20T01:36:39.62
OT.OT13.EHE. ML:1.7 0.000187 1.56 AML other m 2021-10-20T01:36:39.97
OT.OT12.EHE. ML:1.4 7.215E-5 0.58 AML other m 2021-10-20T01:36:40.22
OT.OT12.EHN. ML:1.4 7.935E-5 0.26 AML other m 2021-10-20T01:36:40.53
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