Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.8 on date 18-08-2019 and time 17:47:42 (Italy) in region 5 km NW Accumoli (RI)

A magnitude ML 0.8 earthquake occured in region: 5 km NW Accumoli (RI), on

  • 18-08-2019 15:47:42 (UTC)
  • 18-08-2019 17:47:42 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.7360, 13.2140 at 12 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.

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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
Accumoli RI 5 667 667
Arquata del Tronto AP 8 1178 1845
Norcia PG 12 4957 6802
Amatrice RI 13 2657 9459
Cittareale RI 14 482 9941
Montegallo AP 15 523 10464
Acquasanta Terme AP 16 2916 13380
Cascia PG 17 3217 16597
Castelsantangelo sul Nera MC 18 281 16878

Municipalities with at least 50000 inhabitants

An earthquake occurred to
41 Km W of Teramo (54892 inhabitants)
45 Km NW of L'Aquila (69753 inhabitants)
48 Km SE of Foligno (57155 inhabitants)
50 Km E of Terni (111501 inhabitants)
79 Km SE of Perugia (166134 inhabitants)
80 Km W of Montesilvano (53738 inhabitants)
87 Km W of Pescara (121014 inhabitants)
89 Km W of Chieti (51815 inhabitants)
91 Km NE of Guidonia Montecelio (88673 inhabitants)
92 Km NE of Tivoli (56533 inhabitants)
97 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
Reviewed
Rev100 		ML 0.8 2019-08-18
15:47:42		 42.7357 13.2143 12 2019-08-18
15:57:05		 Sala Sismica INGV-Roma 71607611
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-08-18 15:47:42 ± 0.07
Latitude 42.7357 ± 0.0036
Longitude 13.2143 ± 0.0061
Depth (km) 12 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 71607611

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 484
Semi-minor axis of confidence ellipse (meter) 172
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 70
Circular confidence region, given by single value of horizontal uncertainty (meter) 480.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 96
Number of associated phases, regardless of their use for origin computation 26
Number of defining phases 23
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) 0.38671
Number of stations at which the event was observed 18
Number of stations from which data was used for origin computation 15
Magnitude information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 71607611
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-08-18 15:57:05
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.VVLD.HHZ. 2019-08-18T15:48:13.59 3.0 undecidable manual S 0.25 0
IV.LPEL.HHZ. 2019-08-18T15:48:01.56 3.0 undecidable manual P 0.93 0
IV.LRP.EHZ. 2019-08-18T15:48:01.54 3.0 negative manual P -0.75 0
IV.RM33.EHZ. 2019-08-18T15:47:51.49 0.3 undecidable manual S 180 25.1526 96 0.07 74
IV.MC2.EHZ. 2019-08-18T15:47:50.57 0.3 undecidable manual S 354 19.5693 100 0.62 64
IV.GIGS.HHZ. 2019-08-18T15:47:50.00 0.3 undecidable manual P 137 42.9237 92 -0.26 67
IV.MMO1.EHZ. 2019-08-18T15:47:50.09 0.1 undecidable manual S 27 20.3685 100 -0.05 98
IV.LNSS.HHZ. 2019-08-18T15:47:50.09 0.3 undecidable manual S 224 20.4684 99 -0.08 72
IV.CSP1.EHZ. 2019-08-18T15:47:49.92 0.3 undecidable manual P 359 39.5271 93 0.18 69
IV.CESI.HHE. 2019-08-18T15:47:49.75 0.3 undecidable manual P 320 39.0276 93 0.08 71
IV.FDMO.HHZ. 2019-08-18T15:47:49.15 0.3 undecidable manual P 343 34.9428 93 0.12 71
IT.MTCL.HGE. 2019-08-18T15:47:48.43 0.3 undecidable manual P 329 33.5442 94 -0.39 67
IV.TERO.HHZ. 2019-08-18T15:47:48.99 0.3 undecidable manual P 111 34.1436 93 0.07 72
IV.SMA1.EHZ. 2019-08-18T15:47:48.67 0.3 undecidable manual S 140 15.2736 109 -0.16 71
IV.MTRA.EHZ. 2019-08-18T15:47:48.41 0.3 undecidable manual S 81 15.0738 110 -0.36 69
IV.T1299.HNZ. 2019-08-18T15:47:48.20 0.3 undecidable manual S 154 12.5763 118 0.04 75
IV.NRCA.HHZ. 2019-08-18T15:47:47.90 0.3 undecidable manual S 323 13.5753 115 -0.51 67
IV.CAMP.HHZ. 2019-08-18T15:47:47.81 0.3 undecidable manual P 144 27.2505 95 -0.05 72
IV.RM33.EHZ. 2019-08-18T15:47:47.66 0.3 undecidable manual P 180 25.1526 96 0.13 73
IV.LNSS.HHZ. 2019-08-18T15:47:46.86 0.3 undecidable manual P 224 20.4684 99 0.05 74
IV.MC2.EHZ. 2019-08-18T15:47:46.81 0.6 undecidable manual P 354 19.5693 100 0.12 48
IV.SMA1.EHZ. 2019-08-18T15:47:46.10 0.1 undecidable manual P 140 15.2736 109 0.06 100
IV.MMO1.EHZ. 2019-08-18T15:47:46.77 0.3 undecidable manual P 27 20.3685 100 -0.03 74
IV.MTRA.EHZ. 2019-08-18T15:47:46.33 0.3 undecidable manual P 81 15.0738 110 0.32 71
IV.T1299.HNZ. 2019-08-18T15:47:45.86 0.3 undecidable manual P 154 12.5763 118 0.21 73
IV.NRCA.HHZ. 2019-08-18T15:47:45.68 0.1 undecidable manual P 323 13.5753 115 -0.12 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.TERO.HHN. ML:1.0 0.000043650000000000004 0.1 AML other m 2019-08-18T15:47:54.05
IV.SMA1.EHN. ML:0.8 0.00004874221 0.1664 AML other m 2019-08-18T15:47:50.27
IV.LNSS.HHE. ML:1.0 0.00007379565 0.1408 AML other m 2019-08-18T15:47:51.60
IV.LNSS.HHN. ML:1.0 0.000057561324999999996 0.1408 AML other m 2019-08-18T15:47:50.27
IV.RM33.EHE. ML:0.7 0.000030590085 0.0768 AML other m 2019-08-18T15:47:51.87
IV.RM33.EHN. ML:0.9 0.00004455694 0.0768 AML other m 2019-08-18T15:47:52.06
IV.TERO.HHE. ML:0.8 0.000023363545 0.1024 AML other m 2019-08-18T15:47:54.10
IV.FDMO.HHE. ML:0.6 0.000017239899999999997 0.128 AML other m 2019-08-18T15:47:56.58
IV.FDMO.HHN. ML:0.6 0.000017232815 0.1536 AML other m 2019-08-18T15:47:55.98
IV.CSP1.EHE. ML:0.9 0.000022936675000000005 0.128 AML other m 2019-08-18T15:47:56.47
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