Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 18-04-2020 and time 05:56:31 (Italy) in region 4 km W Apricena (FG)

A magnitude ML 1.1 earthquake occured in region: 4 km W Apricena (FG), on

  • 18-04-2020 03:56:31 (UTC)
  • 18-04-2020 05:56:31 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.7780, 15.3920 at 26 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.

Hai sentito il terremoto? Clicca qui

Did you feel it? Fill in the questionnaire.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Apricena FG 4 13328 13328
Poggio Imperiale FG 6 2724 16052
Lesina FG 10 6410 22462
San Severo FG 10 53905 76367
San Paolo di Civitate FG 12 5818 82185
Torremaggiore FG 13 17311 99496
San Nicandro Garganico FG 16 15566 115062
Serracapriola FG 19 3931 118993
Rignano Garganico FG 20 2117 121110

Municipalities with at least 50000 inhabitants

An earthquake occurred to
10 Km N of San Severo (53905 inhabitants)
37 Km NW of Foggia (151991 inhabitants)
47 Km W of Manfredonia (57279 inhabitants)
71 Km NW of Cerignola (58396 inhabitants)
88 Km NE of Benevento (60091 inhabitants)
90 Km NW of Barletta (94814 inhabitants)
97 Km NW of Andria (100440 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100 		ML 1.1 2020-04-18
03:56:31		 41.7775 15.3918 26 2020-04-18
04:03:31		 Sala Sismica INGV-Roma 78340711
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-04-18 03:56:31 ± 0.17
Latitude 41.7775 ± 0.0090
Longitude 15.3918 ± 0.0072
Depth (km) 26 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 78340711

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 980
Semi-minor axis of confidence ellipse (meter) 266
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 190
Circular confidence region, given by single value of horizontal uncertainty (meter) 980.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 205
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.16
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.26350
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 6
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.5
Num. used stations 8
Type of magnitude ML
Reference to an origin 78340711
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-04-18 04:03:31
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
OT.OT13.EHZ. 2020-04-18T03:56:53.00 3.0 undecidable manual S 0.01 0
IV.SGRT.HHZ. 2020-04-18T03:56:43.05 0.1 undecidable manual S 95 29.2485 125 0.24 94
OT.OT05.EHZ. 2020-04-18T03:56:41.28 0.1 undecidable manual S 127 21.867 135 -0.01 99
IV.MELA.HHZ. 2020-04-18T03:56:41.74 0.3 undecidable manual S 250 23.3544 133 0.16 72
OT.OT04.EHE. 2020-04-18T03:56:40.05 0.3 undecidable manual S 112 16.872 143 -0.37 69
OT.OT06.EHE. 2020-04-18T03:56:40.94 0.3 undecidable manual S 121 19.6692 138 0.05 74
IV.APRC.HHZ. 2020-04-18T03:56:39.77 0.1 undecidable manual S 100 12.6762 150 -0.03 100
IV.MELA.HHZ. 2020-04-18T03:56:37.11 0.3 undecidable manual P 250 23.3544 133 -0.09 73
IV.SGRT.HHZ. 2020-04-18T03:56:37.99 0.1 undecidable manual P 95 29.2485 125 0.08 97
OT.OT05.EHZ. 2020-04-18T03:56:37.13 0.1 undecidable manual P 127 21.867 135 0.09 98
OT.OT06.EHE. 2020-04-18T03:56:36.74 0.1 undecidable manual P 121 19.6692 138 -0.06 98
OT.OT04.EHE. 2020-04-18T03:56:36.42 0.1 undecidable manual P 112 16.872 143 -0.11 98
IV.APRC.HHZ. 2020-04-18T03:56:36.15 0.1 undecidable manual P 100 12.6762 150 -0.03 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.APRC.HHE. ML:1.0 0.00004965 1.08 AML other m 2020-04-18T03:56:40.83
IV.APRC.HHN. ML:1.1 0.00007575 0.12 AML other m 2020-04-18T03:56:40.88
IV.MELA.HHN. ML:1.1 0.0000522 1.62 AML other m 2020-04-18T03:56:41.09
OT.OT05.EHN. ML:2.9 0.00323 0.3 AML other m 2020-04-18T03:56:42.22
IV.MELA.HHE. ML:1.0 0.00004124999999999999 1.6 AML other m 2020-04-18T03:56:42.91
OT.OT05.EHE. ML:3.1 0.00574 1.16 AML other m 2020-04-18T03:56:42.81
IV.SGRT.HHN. ML:0.8 0.00002705 0.62 AML other m 2020-04-18T03:56:43.83
IV.SGRT.HHE. ML:0.7 0.00001855 0.38 AML other m 2020-04-18T03:56:45.47
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