Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 20-08-2019 and time 05:04:58 (Italy) in region 4 km NE Cittareale (RI)

A magnitude ML 1.2 earthquake occured in region: 4 km NE Cittareale (RI), on

  • 20-08-2019 03:04:58 (UTC)
  • 20-08-2019 05:04:58 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.6470, 13.1890 at 13 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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.

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Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Cittareale RI 4 482 482
Accumoli RI 7 667 1149
Amatrice RI 8 2657 3806
Montereale AQ 14 2581 6387
Borbona RI 16 617 7004
Posta RI 16 694 7698
Cascia PG 16 3217 10915
Capitignano AQ 17 665 11580
Arquata del Tronto AP 17 1178 12758
Campotosto AQ 18 542 13300
Norcia PG 18 4957 18257
Monteleone di Spoleto PG 19 599 18856

Municipalities with at least 50000 inhabitants

An earthquake occurred to
37 Km NW of L'Aquila (69753 inhabitants)
42 Km W of Teramo (54892 inhabitants)
45 Km E of Terni (111501 inhabitants)
52 Km SE of Foligno (57155 inhabitants)
80 Km W of Montesilvano (53738 inhabitants)
81 Km NE of Guidonia Montecelio (88673 inhabitants)
82 Km NE of Tivoli (56533 inhabitants)
83 Km SE of Perugia (166134 inhabitants)
86 Km W of Pescara (121014 inhabitants)
87 Km W of Chieti (51815 inhabitants)
92 Km E of Viterbo (67173 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
Bulletin
Rev1000 		ML 1.2 2019-08-20
03:04:58		 42.6467 13.189 13 2019-11-13
14:31:04		 Bollettino Sismico Italiano INGV 73042061
Reviewed
Rev100 		ML 1.2 2019-08-20
03:04:58		 42.6598 13.1888 11 2019-08-20
03:10:25		 Sala Sismica INGV-Roma 71637931
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-08-20 03:04:58 ± 0.06
Latitude 42.6467 ± 0.0045
Longitude 13.1890 ± 0.0049
Depth (km) 13 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 73042061

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 433
Semi-minor axis of confidence ellipse (meter) 218
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 9
Circular confidence region, given by single value of horizontal uncertainty (meter) 430.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 76
Number of associated phases, regardless of their use for origin computation 27
Number of defining phases 26
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.21
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.51081
Number of stations at which the event was observed 15
Number of stations from which data was used for origin computation 14
Magnitudes information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.3
Num. used stations 14
Type of magnitude ML
Reference to an origin 71637931
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-08-20 03:10:25

ML:1.2

Field Value
Value 1.2
Uncertainty 0.3
Num. used stations 14
Type of magnitude ML
Reference to an origin 73042061
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2019-10-04 15:26:39
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.FRON.EHZ. 2019-08-20T03:05:15.81 3.0 undecidable manual P 0.14 0
IV.ARRO.EHZ. 2019-08-20T03:05:10.15 0.6 undecidable manual S 258 35.3424 94 -0.03 48
IV.TERO.HHZ. 2019-08-20T03:05:09.44 0.6 undecidable manual S 94 33.9438 95 -0.37 45
IV.MNTT.EHZ. 2019-08-20T03:05:09.45 0.3 undecidable manual P 36 56.6988 92 1.02 51
IV.MC2.EHZ. 2019-08-20T03:05:08.86 0.6 undecidable manual S 0 29.3484 96 0.27 47
IV.MMO1.EHZ. 2019-08-20T03:05:08.80 0.6 undecidable manual S 22 30.2475 96 -0.01 49
IV.CSP1.EHZ. 2019-08-20T03:05:07.35 0.3 undecidable manual P 1 49.4172 93 0.05 71
IV.GAVE.EHZ. 2019-08-20T03:05:07.21 0.6 undecidable manual S 282 24.5532 99 -0.1 48
IV.NRCA.HHZ. 2019-08-20T03:05:06.14 0.6 undecidable manual S 344 21.6672 101 -0.4 46
IV.CAMP.HHE. 2019-08-20T03:05:06.46 0.6 undecidable manual S 124 21.7671 101 -0.12 49
IV.ARRO.EHZ. 2019-08-20T03:05:05.09 0.1 undecidable manual P 258 35.3424 94 -0.05 96
IV.MTRA.EHZ. 2019-08-20T03:05:05.96 0.6 undecidable manual S 54 20.868 102 -0.38 46
IV.SMA1.EHZ. 2019-08-20T03:05:04.22 0.6 undecidable manual S 98 12.0768 123 0.06 50
IV.TERO.HHZ. 2019-08-20T03:05:04.84 0.1 undecidable manual P 94 33.9438 95 -0.09 96
IV.LNSS.HHZ. 2019-08-20T03:05:04.37 0.6 undecidable manual S 248 13.0758 119 -0.01 50
IV.MC2.EHZ. 2019-08-20T03:05:04.24 0.1 undecidable manual P 0 29.3484 96 0.01 98
IV.RM33.EHZ. 2019-08-20T03:05:04.92 0.6 undecidable manual S 172 15.3735 112 -0.03 50
IV.MMO1.EHZ. 2019-08-20T03:05:04.26 0.1 undecidable manual P 22 30.2475 96 -0.09 96
IV.T1299.HNN. 2019-08-20T03:05:03.05 0.3 undecidable manual S 100 7.6812 140 -0.24 72
IV.CAMP.HHE. 2019-08-20T03:05:03.10 0.1 undecidable manual P 124 21.7671 101 0.04 99
IV.GAVE.EHZ. 2019-08-20T03:05:03.48 0.1 undecidable manual P 282 24.5532 99 -0.01 99
IV.MTRA.EHZ. 2019-08-20T03:05:02.85 0.1 undecidable manual P 54 20.868 102 -0.08 98
IV.NRCA.HHZ. 2019-08-20T03:05:02.91 0.1 positive manual P 344 21.6672 101 -0.13 97
IV.RM33.EHZ. 2019-08-20T03:05:02.25 0.1 positive manual P 172 15.3735 112 0.13 98
IV.T1299.HNN. 2019-08-20T03:05:01.28 0.1 undecidable manual P 100 7.6812 140 0.12 100
IV.SMA1.EHZ. 2019-08-20T03:05:01.90 0.1 undecidable manual P 98 12.0768 123 0.23 97
IV.LNSS.HHZ. 2019-08-20T03:05:01.92 0.1 positive manual P 248 13.0758 119 0.12 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LNSS.HHE. ML:1.5 0.000303 0.16 AML other m 2019-08-20T03:05:04.42
IV.SMA1.EHN. ML:1.4 0.000237 0.26 AML other m 2019-08-20T03:05:04.62
IV.SMA1.EHE. ML:1.5 0.00029200000000000005 0.42 AML other m 2019-08-20T03:05:04.74
IV.LNSS.HHN. ML:1.5 0.0002855 0.54 AML other m 2019-08-20T03:05:04.58
IV.RM33.EHE. ML:1.1 0.0001085 0.28 AML other m 2019-08-20T03:05:05.21
IV.RM33.EHN. ML:1.1 0.00011649999999999999 0.92 AML other m 2019-08-20T03:05:05.63
IV.NRCA.HHE. ML:1.5 0.0001915 0.9 AML other m 2019-08-20T03:05:06.88
IV.NRCA.HHN. ML:1.2 0.0000922 1.08 AML other m 2019-08-20T03:05:07.06
IV.GAVE.EHN. ML:1.2 0.00009305 0.56 AML other m 2019-08-20T03:05:07.46
IV.GAVE.EHE. ML:1.2 0.00007764999999999999 1.18 AML other m 2019-08-20T03:05:07.94
IV.TERO.HHN. ML:0.9 0.0000296 0.52 AML other m 2019-08-20T03:05:11.16
IV.TERO.HHE. ML:0.9 0.000032 0.5 AML other m 2019-08-20T03:05:11.48
IV.ARRO.EHN. ML:0.7 0.0000224 0.2 AML other m 2019-08-20T03:05:11.84
IV.ARRO.EHE. ML:0.6 0.00001545 1.48 AML other m 2019-08-20T03:05:13.77
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