Earthquake with magnitude of ML 1.1 on date 22-08-2021 and time 03:41:07 (Italy) in region 8 km S San Giovanni Rotondo (FG)

A magnitude ML 1.1 earthquake occured in region: 8 km S San Giovanni Rotondo (FG), on

  • 22-08-2021 01:41:07 (UTC)
  • 22-08-2021 03:41:07 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.634, 15.724 at 20 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 Giovanni Rotondo FG 8 27184 27184
San Marco in Lamis FG 11 13831 41015
Rignano Garganico FG 12 2117 43132
Manfredonia FG 16 57279 100411

Municipalities with at least 50000 inhabitants

An earthquake occurred to
16 Km W of Manfredonia (57279 inhabitants)
24 Km NE of Foggia (151991 inhabitants)
29 Km E of San Severo (53905 inhabitants)
44 Km NW of Cerignola (58396 inhabitants)
58 Km NW of Barletta (94814 inhabitants)
66 Km NW of Andria (100440 inhabitants)
70 Km NW of Trani (56217 inhabitants)
78 Km NW of Bisceglie (55422 inhabitants)
87 Km NW of Molfetta (59874 inhabitants)
97 Km NE of Benevento (60091 inhabitants)
100 Km NW of Bitonto (55540 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 1.1 2021-08-22
01:41:07
41.6338 15.7242 20 2021-08-22
01:50:42
Sala Sismica INGV-Roma 94480941
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-08-22 01:41:07 ± 0.19
Latitude 41.6338 ± 0.0099
Longitude 15.7242 ± 0.0072
Depth (km) 20 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 94480941

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 967
Semi-minor axis of confidence ellipse (meter) 578
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 198
Circular confidence region, given by single value of horizontal uncertainty (meter) 970
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 105
Number of associated phases, regardless of their use for origin computation 26
Number of defining phases 18
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) 0.18346
Number of stations at which the event was observed 17
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.3
Num. used stations 14
Type of magnitude ML
Reference to an origin 94480941
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-08-22 01:50:42
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
GU.CANO.HHZ. 2021-08-22T01:42:27.52 3.0 positive manual Pn 1.51 0
NI.POLC.HHZ. 2021-08-22T01:42:27.56 3.0 positive manual Pg 11.72 0
IV.ARVD.HHZ. 2021-08-22T01:42:05.59 3.0 undecidable manual Sn -9.99 0
IV.CRTC.HHZ. 2021-08-22T01:41:49.15 3.0 undecidable manual Pg 2.29 0
IV.VVLD.HHZ. 2021-08-22T01:41:42.90 3.0 undecidable manual Sg -0.3 0
CR.STON.BHZ. 2021-08-22T01:41:41.04 3.0 positive manual Pg 5.34 0
IV.GIZZ.HHZ. 2021-08-22T01:41:29.57 3.0 positive manual Pn -0.19 0
IV.ICAI.EHZ. 2021-08-22T01:41:16.47 3.0 positive manual P 0.06 0
IV.MSAG.HHZ. 2021-08-22T01:41:15.35 0.3 undecidable manual S 61 0.1592 132 0.07 73
IV.APRC.HHZ. 2021-08-22T01:41:15.80 0.3 undecidable manual S 312 0.1835 127 -0.03 74
IV.SGRT.HHZ. 2021-08-22T01:41:14.34 0.3 undecidable manual S 7 0.1214 140 -0.17 73
OT.OT04.EHE. 2021-08-22T01:41:14.78 0.3 undecidable manual S 309 0.1367 136 -0.03 75
OT.OT12.EHZ. 2021-08-22T01:41:14.59 0.3 undecidable manual S 91 0.1376 136 -0.22 72
OT.OT06.EHE. 2021-08-22T01:41:14.45 0.3 undecidable manual S 298 0.1097 143 0.16 73
OT.OT03.EHE. 2021-08-22T01:41:14.17 0.3 undecidable manual S 325 0.0962 147 0.11 73
OT.OT07.EHE. 2021-08-22T01:41:13.46 0.3 undecidable manual S 196 0.0126 175 0.21 74
OT.OT05.EHZ. 2021-08-22T01:41:13.53 0.3 undecidable manual S 286 0.0944 148 -0.5 68
IV.APRC.HHZ. 2021-08-22T01:41:12.16 0.3 undecidable manual P 312 0.1835 127 0.03 74
IV.MSAG.HHZ. 2021-08-22T01:41:11.84 0.1 undecidable manual P 61 0.1592 132 0.03 99
OT.OT03.EHE. 2021-08-22T01:41:11.20 0.3 undecidable manual P 325 0.0962 147 0.1 74
IV.SGRT.HHZ. 2021-08-22T01:41:11.36 0.1 undecidable manual P 7 0.1214 140 0 100
OT.OT04.EHE. 2021-08-22T01:41:11.60 0.1 undecidable manual P 309 0.1367 136 0.06 99
OT.OT12.EHZ. 2021-08-22T01:41:11.53 0.1 undecidable manual P 91 0.1376 136 -0.01 99
OT.OT06.EHE. 2021-08-22T01:41:11.46 0.3 undecidable manual P 298 0.1097 143 0.22 72
OT.OT07.EHE. 2021-08-22T01:41:10.85 0.1 undecidable manual P 196 0.0126 175 0.21 98
OT.OT05.EHZ. 2021-08-22T01:41:10.60 0.3 undecidable manual P 286 0.0944 148 -0.49 68
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
OT.OT05.EHN. ML:1.1 9.105E-5 0.08 AML other m 2021-08-22T01:41:13.74
OT.OT05.EHE. ML:-0.2 6.7827555E-6 0.08 AML other m 2021-08-22T01:41:14.11
IV.SGRT.HHE. ML:1 6.294709E-5 0.2 AML other m 2021-08-22T01:41:14.61
IV.SGRT.HHN. ML:1.1 7.805E-5 0.16 AML other m 2021-08-22T01:41:14.63
OT.OT12.EHE. ML:1.1 8.335E-5 0.1 AML other m 2021-08-22T01:41:14.77
OT.OT12.EHN. ML:1.3 0.0001185 0.1 AML other m 2021-08-22T01:41:15.00
IV.APRC.HHE. ML:0.9 4.728887E-5 0.18 AML other m 2021-08-22T01:41:16.37
IV.APRC.HHN. ML:1 4.939117E-5 0.12 AML other m 2021-08-22T01:41:16.39
IV.MSAG.HNE. ML:1.2 9.341193E-5 0.12 AML other m 2021-08-22T01:41:15.54
IV.MSAG.HNN. ML:1.3 0.000121640325 1.04 AML other m 2021-08-22T01:41:16.51
IV.MSAG.HHE. ML:0.8 4.040638E-5 0.14 AML other m 2021-08-22T01:41:15.47
IV.MSAG.HHN. ML:0.9 4.855432E-5 1.06 AML other m 2021-08-22T01:41:16.51
IV.APRC.HNE. ML:1.3 0.00010897217 1.9408 AML other m 2021-08-22T01:41:15.54
IV.APRC.HNN. ML:2.2 0.0009201361 0.62 AML other m 2021-08-22T01:41:15.29
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