Earthquake with magnitude of ML 1.0 on date 20-09-2021 and time 19:54:50 (UTC) in region Costa Garganica (Foggia)

A magnitude ML 1.0 earthquake occured in region: Costa Garganica (Foggia), on

  • 20-09-2021 19:54:50 (UTC)
  • 20-09-2021 21:54:50 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.967, 15.82 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
Rodi Garganico FG 7 3693 3693
Ischitella FG 10 4432 8125
Vico del Gargano FG 14 7766 15891
Carpino FG 14 4182 20073
Cagnano Varano FG 16 7330 27403
Peschici FG 16 4521 31924

Municipalities with at least 50000 inhabitants

An earthquake occurred to
39 Km N of Manfredonia (57279 inhabitants)
48 Km NE of San Severo (53905 inhabitants)
61 Km NE of Foggia (151991 inhabitants)
78 Km N of Cerignola (58396 inhabitants)
81 Km NW of Barletta (94814 inhabitants)
91 Km NW of Andria (100440 inhabitants)
92 Km NW of Trani (56217 inhabitants)
99 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 earthquake resentment in the area, expressed in terms of intensity on the MCS scale (Mercalli-Cancani-Sieberg). Intensities are determined using data from questionnaires collected on the website http://www.hsit.it. The intensities shown are determined considering all the reports received from each municipality, and are all the more reliable the greater the number of questionnaires. The collected data are subjected to an automatic statistical filter, but are not checked individually. In particular, intensities greater than or equal to the VI degree of the MCS or EMS scale require on-site verification by specialized personnel. The black star is the epicenter of the earthquake that occurred. This map is updated every time citizens fill out new questionnaires. The number of questionnaires processed to obtain this map, the date and time of the last update are shown at the top right.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 1.0 2021-09-20
19:54:50
41.9673 15.8203 22 2021-09-20
20:13:07
Sala Sismica INGV-Roma 95675171
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-20 19:54:50 ± 0.25
Latitude 41.9673 ± 0.0117
Longitude 15.8203 ± 0.0145
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 95675171

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1426
Semi-minor axis of confidence ellipse (meter) 792
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 138
Circular confidence region, given by single value of horizontal uncertainty (meter) 1430
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 290
Number of associated phases, regardless of their use for origin computation 20
Number of defining phases 8
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.19
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.34804
Number of stations at which the event was observed 16
Number of stations from which data was used for origin computation 4
Magnitude information

ML:1

Field Value
Value 1
Uncertainty 0.2
Num. used stations 5
Type of magnitude ML
Reference to an origin 95675171
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-20 20:13:07
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
OT.OT05.EHZ. 2021-09-20T19:55:03.43 0.3 undecidable manual S 208 0.348 112 -0.25 67
IV.MSAG.HHZ. 2021-09-20T19:55:01.25 0.3 undecidable manual S 165 0.2635 120 -0.17 72
IV.SGRT.HHZ. 2021-09-20T19:55:00.55 0.3 undecidable manual S 195 0.2203 126 0.21 71
OT.OT05.EHZ. 2021-09-20T19:54:58.02 0.1 undecidable manual P 208 0.348 112 -0.01 94
OT.OT14.EHZ. 2021-09-20T19:54:57.86 0.3 undecidable manual S 138 0.0953 151 0.02 74
IV.SGRT.HHZ. 2021-09-20T19:54:56.32 0.1 undecidable manual P 195 0.2203 126 0.22 94
IV.MSAG.HHZ. 2021-09-20T19:54:56.72 0.1 undecidable manual P 165 0.2635 120 -0.01 96
OT.OT14.EHZ. 2021-09-20T19:54:54.65 0.1 undecidable manual P 138 0.0953 151 -0.01 100
IV.EFIU.HHZ. 2021-09-20T19:54:36.06 3.0 undecidable manual Pn -9.99 0
GU.BURY.HHZ. 2021-09-20T19:54:32.22 3.0 undecidable manual Sn 8.4 0
IV.LPEL.HHZ. 2021-09-20T19:54:19.90 3.0 undecidable manual Sg -4.81 0
OT.OT17.EHZ. 2021-09-20T19:53:59.42 3.0 positive manual Pn -4.27 0
IV.MNTV.EHZ. 2021-09-20T19:53:47.84 3.0 undecidable manual Sn 3.1 0
MN.TRI.HHZ. 2021-09-20T19:53:42.19 3.0 negative manual Pg -2.63 0
OX.PLRO.HHZ. 2021-09-20T19:53:40.86 3.0 positive manual Pn -9.9 0
IV.ZEN8.EHZ. 2021-09-20T19:53:35.43 3.0 undecidable manual Pn 0.06 0
IV.FIR.HHZ. 2021-09-20T19:53:19.95 3.0 undecidable manual P 3.41 0
IV.ATPI.EHZ. 2021-09-20T19:53:18.23 3.0 undecidable manual P -6.79 0
IV.ATVO.HHZ. 2021-09-20T19:53:18.50 3.0 undecidable manual P -7.17 0
IV.CPGN.EHZ. 2021-09-20T19:53:12.90 3.0 undecidable manual P -9 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SGRT.HHE. ML:1 4.3919645E-5 0.7168 AML other m 2021-09-20T19:55:01.11
IV.SGRT.HHN. ML:1.2 7.1664425E-5 0.3072 AML other m 2021-09-20T19:55:00.93
IV.MSAG.HHE. ML:0.8 2.5274785E-5 0.2816 AML other m 2021-09-20T19:55:01.94
IV.MSAG.HHN. ML:1.2 6.896936E-5 3.2 AML other m 2021-09-20T19:55:04.12
OT.OT05.EHN. ML:0.9 2.41361975E-5 0.9472 AML other m 2021-09-20T19:55:05.61
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