Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 21-08-2019 and time 15:00:37 (UTC) in region 3 km W Accumoli (RI)

A magnitude ML 1.5 earthquake occured in region: 3 km W Accumoli (RI), on

  • 21-08-2019 15:00:37 (UTC)
  • 21-08-2019 17:00:37 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.7080, 13.2090 at 11 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
Accumoli RI 4 667 667
Arquata del Tronto AP 10 1178 1845
Cittareale RI 11 482 2327
Amatrice RI 11 2657 4984
Norcia PG 13 4957 9941
Cascia PG 16 3217 13158
Acquasanta Terme AP 18 2916 16074
Montegallo AP 18 523 16597

Municipalities with at least 50000 inhabitants

An earthquake occurred to
41 Km W of Teramo (54892 inhabitants)
43 Km NW of L'Aquila (69753 inhabitants)
49 Km E of Terni (111501 inhabitants)
50 Km SE of Foligno (57155 inhabitants)
80 Km W of Montesilvano (53738 inhabitants)
80 Km SE of Perugia (166134 inhabitants)
87 Km W of Pescara (121014 inhabitants)
88 Km NE of Guidonia Montecelio (88673 inhabitants)
88 Km W of Chieti (51815 inhabitants)
89 Km NE of Tivoli (56533 inhabitants)
96 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 1.5 2019-08-21
15:00:37		 42.7077 13.2092 11 2019-11-13
14:31:05		 Bollettino Sismico Italiano INGV 73139211
Reviewed
Rev100 		ML 1.5 2019-08-21
15:00:37		 42.7047 13.2082 11 2019-08-21
15:07:50		 Sala Sismica INGV-Roma 71680671
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-08-21 15:00:37 ± 0.05
Latitude 42.7077 ± 0.0027
Longitude 13.2092 ± 0.0037
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 73139211

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 295
Semi-minor axis of confidence ellipse (meter) 201
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 78
Circular confidence region, given by single value of horizontal uncertainty (meter) 290.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 41
Number of associated phases, regardless of their use for origin computation 45
Number of defining phases 45
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.24
Epicentral distance of station closest to the epicenter (degree) 0.09083
Epicentral distance of station farthest from the epicenter (degree) 0.63492
Number of stations at which the event was observed 26
Number of stations from which data was used for origin computation 26
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 40
Type of magnitude ML
Reference to an origin 71680671
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-08-21 15:07:50

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 40
Type of magnitude ML
Reference to an origin 73139211
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2019-10-08 15:11:35
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.GUMA.HHZ. 2019-08-21T15:00:51.71 0.1 undecidable manual S 15 40.7259 50 0.94 73
IV.CSP1.EHZ. 2019-08-21T15:00:51.46 0.6 undecidable manual S 360 42.624 50 0.18 46
IV.GIGS.HHZ. 2019-08-21T15:00:50.55 0.1 undecidable manual S 133 40.9257 50 -0.29 91
IV.ARRO.EHZ. 2019-08-21T15:00:50.35 0.6 undecidable manual S 249 38.9277 50 0.06 48
IV.MF5.EHZ. 2019-08-21T15:00:50.81 0.6 undecidable manual S 33 37.1295 50 0.98 36
IV.FDMO.HHZ. 2019-08-21T15:00:49.88 0.1 undecidable manual S 345 37.8288 50 -0.12 95
IV.EL6.EHZ. 2019-08-21T15:00:49.49 0.3 undecidable manual P 353 69.4749 50 -0.08 68
IT.MTCL.HGZ. 2019-08-21T15:00:49.31 0.6 undecidable manual S 332 36.0417 50 -0.22 47
IV.T0110.HHZ. 2019-08-21T15:00:49.88 0.3 undecidable manual P 139 70.4739 50 0.16 66
IV.TERO.HHZ. 2019-08-21T15:00:48.53 0.6 undecidable manual S 106 33.5442 50 -0.33 46
IV.SNTG.HHZ. 2019-08-21T15:00:48.79 0.3 undecidable manual P 340 64.491 50 -0.01 69
IV.FEMA.HNE. 2019-08-21T15:00:48.09 0.6 undecidable manual S 335 31.0467 50 -0.11 48
IV.VCEL.EHZ. 2019-08-21T15:00:48.81 0.3 undecidable manual P 124 62.1933 50 0.37 65
IV.ASSB.HHZ. 2019-08-21T15:00:47.90 0.3 undecidable manual P 310 58.1973 50 0.08 69
IV.MOMA.HHZ. 2019-08-21T15:00:47.21 0.3 undecidable manual P 282 53.1024 50 0.17 69
IV.MC2.EHZ. 2019-08-21T15:00:46.06 0.1 undecidable manual S 356 22.6551 50 0.1 98
IV.CAMP.HHZ. 2019-08-21T15:00:46.40 0.1 undecidable manual S 139 25.0527 50 -0.2 95
IV.GAVE.EHZ. 2019-08-21T15:00:46.83 0.1 undecidable manual S 266 25.752 50 0.05 98
IV.FIAM.HHZ. 2019-08-21T15:00:46.53 0.3 undecidable manual P 189 49.3173 50 0.07 70
IV.CSP1.EHZ. 2019-08-21T15:00:45.24 0.1 undecidable manual P 360 42.624 50 -0.19 93
IV.MMO1.EHZ. 2019-08-21T15:00:45.89 0.1 undecidable manual S 24 23.3544 50 -0.24 95
IV.GUMA.HHZ. 2019-08-21T15:00:45.42 0.1 undecidable manual P 15 40.7259 50 0.29 91
IV.RM33.EHZ. 2019-08-21T15:00:45.76 0.1 undecidable manual S 179 22.0668 50 -0.03 99
IT.MTCL.HGZ. 2019-08-21T15:00:44.18 0.1 undecidable manual P 332 36.0417 50 -0.23 93
IV.MF5.EHZ. 2019-08-21T15:00:44.95 0.1 undecidable manual P 33 37.1295 50 0.37 90
IV.GIGS.HHZ. 2019-08-21T15:00:44.98 0.1 undecidable manual P 133 40.9257 50 -0.19 93
IV.LNSS.HHZ. 2019-08-21T15:00:44.83 0.1 undecidable manual S 230 18.0708 50 0.11 98
IV.FDMO.HHZ. 2019-08-21T15:00:44.46 0.1 undecidable manual P 345 37.8288 50 -0.22 93
IV.ARRO.EHZ. 2019-08-21T15:00:44.80 0.1 undecidable manual P 249 38.9277 50 -0.05 96
IV.NRCA.HNZ. 2019-08-21T15:00:43.81 0.1 undecidable manual S 331 15.9729 124 -0.33 94
IV.T1299.HNN. 2019-08-21T15:00:43.09 0.6 undecidable manual S 144 10.0788 137 0.51 46
IV.MTRA.EHZ. 2019-08-21T15:00:43.93 0.1 undecidable manual S 70 16.1727 124 -0.28 95
IV.TERO.HHZ. 2019-08-21T15:00:43.69 0.1 undecidable manual P 106 33.5442 50 -0.33 91
IV.FEMA.HNE. 2019-08-21T15:00:43.42 0.3 undecidable manual P 335 31.0467 50 -0.22 71
IV.SMA1.EHZ. 2019-08-21T15:00:43.49 0.1 undecidable manual S 130 13.3755 129 0.07 100
IV.GAVE.EHZ. 2019-08-21T15:00:42.75 0.1 undecidable manual P 266 25.752 50 -0.07 98
IV.RM33.EHZ. 2019-08-21T15:00:42.27 0.1 undecidable manual P 179 22.0668 50 0.02 100
IV.MC2.EHZ. 2019-08-21T15:00:42.29 0.1 undecidable manual P 356 22.6551 50 -0.06 99
IV.MMO1.EHZ. 2019-08-21T15:00:42.36 0.1 undecidable manual P 24 23.3544 50 -0.09 98
IV.CAMP.HHZ. 2019-08-21T15:00:42.59 0.1 undecidable manual P 139 25.0527 50 -0.13 97
IV.SMA1.EHZ. 2019-08-21T15:00:41.04 0.1 positive manual P 130 13.3755 129 0.16 98
IV.NRCA.HNZ. 2019-08-21T15:00:41.24 0.1 negative manual P 331 15.9729 124 -0.06 100
IV.MTRA.EHZ. 2019-08-21T15:00:41.27 0.1 positive manual P 70 16.1727 124 -0.07 100
IV.LNSS.HHZ. 2019-08-21T15:00:41.71 0.1 positive manual P 230 18.0708 50 0.08 99
IV.T1299.HNN. 2019-08-21T15:00:40.72 0.1 undecidable manual P 144 10.0788 137 0.32 96
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SMA1.EHE. ML:1.6 0.0004215 0.2 AML other m 2019-08-21T15:00:43.73
IV.NRCA.HNE. ML:2.2 0.0015249999999999999 0.12 AML other m 2019-08-21T15:00:43.93
IV.NRCA.HHN. ML:2.4 0.00207 1.84 AML other m 2019-08-21T15:00:43.92
IV.NRCA.HNN. ML:2.3 0.00181 1.84 AML other m 2019-08-21T15:00:43.93
IV.SMA1.EHN. ML:1.7 0.0004805 0.52 AML other m 2019-08-21T15:00:44.31
IV.MTRA.EHE. ML:1.7 0.0003935 0.26 AML other m 2019-08-21T15:00:44.15
IV.NRCA.HHE. ML:2.2 0.001595 0.72 AML other m 2019-08-21T15:00:44.92
IV.MTRA.EHN. ML:1.5 0.000287 0.58 AML other m 2019-08-21T15:00:44.50
IV.LNSS.HNE. ML:2.0 0.0007024999999999999 1.82 AML other m 2019-08-21T15:00:44.04
IV.LNSS.HHE. ML:2.0 0.0007275000000000001 1.84 AML other m 2019-08-21T15:00:44.03
IV.LNSS.HHN. ML:1.8 0.0005875 0.34 AML other m 2019-08-21T15:00:45.24
IV.LNSS.HNN. ML:1.8 0.0005825 0.46 AML other m 2019-08-21T15:00:45.25
IV.RM33.EHN. ML:1.5 0.00021999999999999998 0.24 AML other m 2019-08-21T15:00:45.97
IV.RM33.EHE. ML:1.7 0.000311 0.12 AML other m 2019-08-21T15:00:46.19
IV.CAMP.HHE. ML:1.1 0.00007645 0.2 AML other m 2019-08-21T15:00:46.55
IV.CAMP.HHN. ML:1.2 0.00009515 0.24 AML other m 2019-08-21T15:00:46.62
IV.GAVE.EHE. ML:1.9 0.00041000000000000005 0.3 AML other m 2019-08-21T15:00:47.31
IV.GAVE.EHN. ML:1.8 0.0003625 0.88 AML other m 2019-08-21T15:00:48.05
IV.TERO.HHN. ML:1.7 0.0001875 0.96 AML other m 2019-08-21T15:00:49.01
IV.TERO.HHE. ML:1.5 0.000123 0.1 AML other m 2019-08-21T15:00:50.06
IV.FDMO.HHN. ML:1.3 0.0000739 0.16 AML other m 2019-08-21T15:00:50.64
IV.GIGS.HHN. ML:1.2 0.000048100000000000004 0.08 AML other m 2019-08-21T15:00:51.02
IV.GIGS.HHE. ML:1.0 0.00003625000000000001 0.54 AML other m 2019-08-21T15:00:51.04
IV.GUMA.HHE. ML:2.2 0.000493 0.28 AML other m 2019-08-21T15:00:51.84
IV.GUMA.HHN. ML:2.0 0.000312 0.32 AML other m 2019-08-21T15:00:52.08
IV.FDMO.HHE. ML:1.2 0.0000533 1.76 AML other m 2019-08-21T15:00:52.96
IV.CSP1.EHN. ML:1.4 0.00008695 0.26 AML other m 2019-08-21T15:00:52.23
IV.ARRO.EHE. ML:1.4 0.0000805 0.18 AML other m 2019-08-21T15:00:52.51
IV.ARRO.EHN. ML:1.2 0.000061 0.16 AML other m 2019-08-21T15:00:52.55
IV.CSP1.EHE. ML:1.4 0.0000908 0.26 AML other m 2019-08-21T15:00:52.76
IV.FIAM.HHE. ML:0.9 0.0000224 1.2 AML other m 2019-08-21T15:00:53.79
IV.FIAM.HHN. ML:0.9 0.00001875 0.5 AML other m 2019-08-21T15:00:53.58
IV.ASSB.HHN. ML:1.4 0.00005165 0.2 AML other m 2019-08-21T15:00:56.44
IV.ASSB.HHE. ML:1.4 0.000054550000000000005 0.44 AML other m 2019-08-21T15:00:57.74
IV.SNTG.HHE. ML:1.0 0.0000189 1.36 AML other m 2019-08-21T15:00:59.05
IV.VCEL.EHN. ML:1.6 0.000071 1 AML other m 2019-08-21T15:01:00.07
IV.VCEL.EHE. ML:1.4 0.0000515 1.04 AML other m 2019-08-21T15:01:00.40
IV.SNTG.HHN. ML:1.0 0.000019950000000000004 1.38 AML other m 2019-08-21T15:01:01.13
IV.T0110.HHN. ML:1.5 0.00005465 0.32 AML other m 2019-08-21T15:01:02.59
IV.T0110.HHE. ML:1.5 0.000051500000000000005 0.32 AML other m 2019-08-21T15:01:03.57
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