Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 23-04-2020 and time 05:47:16 (Italy) in region 7 km W Accumoli (RI)

A magnitude ML 1.6 earthquake occured in region: 7 km W Accumoli (RI), on

  • 23-04-2020 03:47:16 (UTC)
  • 23-04-2020 05:47:16 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.7000, 13.1590 at 10 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 7 667 667
Cittareale RI 9 482 1149
Norcia PG 12 4957 6106
Cascia PG 12 3217 9323
Amatrice RI 13 2657 11980
Arquata del Tronto AP 14 1178 13158
Monteleone di Spoleto PG 18 599 13757
Poggiodomo PG 18 117 13874

Municipalities with at least 50000 inhabitants

An earthquake occurred to
43 Km NW of L'Aquila (69753 inhabitants)
45 Km E of Terni (111501 inhabitants)
45 Km W of Teramo (54892 inhabitants)
47 Km SE of Foligno (57155 inhabitants)
77 Km SE of Perugia (166134 inhabitants)
84 Km W of Montesilvano (53738 inhabitants)
85 Km NE of Guidonia Montecelio (88673 inhabitants)
87 Km NE of Tivoli (56533 inhabitants)
90 Km W of Pescara (121014 inhabitants)
91 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 1.6 2020-04-23
03:47:16		 42.6998 13.1587 10 2020-07-18
21:08:37		 Bollettino Sismico Italiano INGV 79616251
Reviewed
Rev100 		ML 1.6 2020-04-23
03:47:16		 42.705 13.157 10 2020-04-23
03:53:13		 Sala Sismica INGV-Roma 78489271
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-04-23 03:47:16 ± 0.06
Latitude 42.6998 ± 0.0027
Longitude 13.1587 ± 0.0037
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 79616251

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 309
Semi-minor axis of confidence ellipse (meter) 245
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 249
Circular confidence region, given by single value of horizontal uncertainty (meter) 310.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 45
Number of associated phases, regardless of their use for origin computation 41
Number of defining phases 39
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.27
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.65471
Number of stations at which the event was observed 23
Number of stations from which data was used for origin computation 21
Magnitudes information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 52
Type of magnitude ML
Reference to an origin 79616251
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-05-27 09:45:05

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 44
Type of magnitude ML
Reference to an origin 78489271
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-04-23 03:53:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ROSPO.HHZ. 2020-04-23T03:47:43.42 3.0 positive manual P 2.32 0
IV.FAGN.HHZ. 2020-04-23T03:47:37.08 3.0 undecidable manual S 0.75 0
IV.MOMA.HHZ. 2020-04-23T03:47:32.40 0.1 undecidable manual S 284 49.3173 50 0.26 90
IV.CESX.HHZ. 2020-04-23T03:47:32.00 0.1 undecidable manual S 258 47.7189 50 0.28 90
IV.FIAM.HHZ. 2020-04-23T03:47:31.80 0.1 undecidable manual S 184 48.0186 50 0 95
IV.GIGS.HHZ. 2020-04-23T03:47:30.30 0.1 undecidable manual S 129 43.5231 50 -0.3 90
IV.CSP1.EHZ. 2020-04-23T03:47:30.70 0.1 undecidable manual S 5 43.623 50 0.07 95
IV.GUMA.HHZ. 2020-04-23T03:47:30.90 0.1 undecidable manual S 20 42.7239 50 0.51 86
IV.CESI.HHZ. 2020-04-23T03:47:29.30 0.1 undecidable manual S 329 39.627 50 -0.27 91
IV.T0110.HHZ. 2020-04-23T03:47:29.44 0.1 undecidable manual P 136 72.6717 50 0.37 84
IV.MF5.EHZ. 2020-04-23T03:47:29.90 0.1 undecidable manual S 37 40.2264 50 0.17 93
IV.VCEL.EHZ. 2020-04-23T03:47:28.66 0.1 undecidable manual P 121 65.1903 50 0.73 76
IV.ARRO.EHZ. 2020-04-23T03:47:28.20 0.1 undecidable manual S 247 34.743 50 -0.06 96
IV.TERO.HHZ. 2020-04-23T03:47:28.60 0.1 undecidable manual S 103 37.3293 50 -0.34 90
IV.FEMA.HNZ. 2020-04-23T03:47:27.20 0.1 undecidable manual S 343 30.4473 50 0.1 96
IV.MNTT.EHZ. 2020-04-23T03:47:26.56 0.1 undecidable manual P 41 53.6019 50 0.41 86
IV.CESX.HHZ. 2020-04-23T03:47:25.11 0.1 negative manual P 258 47.7189 50 -0.13 93
IV.MC2.EHE. 2020-04-23T03:47:25.40 0.1 undecidable manual S 6 23.5542 50 0.12 97
IV.FIAM.HHZ. 2020-04-23T03:47:25.12 0.1 positive manual P 184 48.0186 50 -0.16 92
IV.MOMA.HHZ. 2020-04-23T03:47:25.22 0.1 positive manual P 284 49.3173 50 -0.26 90
IV.MMO1.EHZ. 2020-04-23T03:47:25.70 0.1 undecidable manual S 32 26.0517 50 -0.23 94
IV.MTRA.EHZ. 2020-04-23T03:47:24.00 0.1 undecidable manual S 72 20.3685 117 -0.31 94
IV.CSP1.EHZ. 2020-04-23T03:47:24.50 0.1 negative manual P 5 43.623 50 -0.11 94
IV.GUMA.HHZ. 2020-04-23T03:47:24.68 0.1 positive manual P 20 42.7239 50 0.21 92
IV.RM33.EHZ. 2020-04-23T03:47:24.50 0.1 undecidable manual S 168 21.6672 116 -0.2 95
IV.GIGS.HHZ. 2020-04-23T03:47:24.25 0.1 undecidable manual P 129 43.5231 50 -0.33 89
IV.MF5.EHZ. 2020-04-23T03:47:23.48 0.1 negative manual P 37 40.2264 50 -0.6 83
IV.TERO.HHZ. 2020-04-23T03:47:23.52 0.1 negative manual P 103 37.3293 50 -0.11 95
IV.SMA1.EHZ. 2020-04-23T03:47:23.60 0.1 undecidable manual S 118 16.3725 122 0.51 90
IV.CESI.HHZ. 2020-04-23T03:47:23.80 0.1 negative manual P 329 39.627 50 -0.19 93
IV.ARRO.EHZ. 2020-04-23T03:47:22.95 0.1 positive manual P 247 34.743 50 -0.28 92
IV.NRCA.HHZ. 2020-04-23T03:47:22.40 0.3 undecidable manual S 346 15.2736 124 -0.38 70
IV.FEMA.HNZ. 2020-04-23T03:47:22.88 0.1 undecidable manual P 343 30.4473 50 0.31 92
IV.LNSS.HHZ. 2020-04-23T03:47:22.60 0.1 undecidable manual S 222 14.4744 126 0.05 100
IV.RM33.EHZ. 2020-04-23T03:47:21.17 0.1 undecidable manual P 168 21.6672 116 -0.01 99
IV.MMO1.EHZ. 2020-04-23T03:47:21.80 0.1 positive manual P 32 26.0517 50 -0.09 97
IV.MC2.EHE. 2020-04-23T03:47:21.47 0.1 positive manual P 6 23.5542 50 -0.05 98
IV.SMA1.EHZ. 2020-04-23T03:47:20.52 0.1 negative manual P 118 16.3725 122 0.27 95
IV.LNSS.HHZ. 2020-04-23T03:47:20.11 0.1 positive manual P 222 14.4744 126 0.17 97
IV.MTRA.EHZ. 2020-04-23T03:47:20.93 0.1 positive manual P 72 20.3685 117 -0.03 99
IV.NRCA.HHZ. 2020-04-23T03:47:20.04 0.1 positive manual P 346 15.2736 124 -0.03 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LNSS.HNN. ML:0.0 0.0009072797999999999 0.1984 AML other m 2020-04-23T03:47:22.97
IV.LNSS.HHN. ML:0.0 0.0009659722499999999 0.1984 AML other m 2020-04-23T03:47:22.97
IV.NRCA.HHE. ML:0.0 0.0005446709000000001 0.1408 AML other m 2020-04-23T03:47:22.00
IV.NRCA.HNE. ML:0.0 0.00052370925 1.8592 AML other m 2020-04-23T03:47:22.00
IV.LNSS.HNE. ML:0.0 0.00105501025 1.8208 AML other m 2020-04-23T03:47:23.06
IV.LNSS.HHE. ML:0.0 0.00106383815 1.8208 AML other m 2020-04-23T03:47:23.06
IV.NRCA.HNN. ML:0.0 0.0004596186 0.0896 AML other m 2020-04-23T03:47:23.68
IV.SMA1.EHE. ML:0.0 0.0008477037499999999 0.1792 AML other m 2020-04-23T03:47:24.06
IV.SMA1.EHN. ML:0.0 0.0004563136 0.1824 AML other m 2020-04-23T03:47:24.13
IV.NRCA.HHN. ML:0.0 0.0005098042000000001 0.0992 AML other m 2020-04-23T03:47:24.56
IV.MTRA.HNN. ML:0.0 0.00032109455 0.2304 AML other m 2020-04-23T03:47:24.72
IV.MTRA.EHN. ML:0.0 0.0003261476 0.24 AML other m 2020-04-23T03:47:24.72
IV.MTRA.HNE. ML:0.0 0.0004675207 0.1792 AML other m 2020-04-23T03:47:24.73
IV.MTRA.EHE. ML:0.0 0.00048431905 0.2016 AML other m 2020-04-23T03:47:24.73
IV.RM33.EHE. ML:0.0 0.00016162394999999998 0.2016 AML other m 2020-04-23T03:47:25.43
IV.FIAM.HNE. ML:2.7 0.0014384284 0.3584 AML other m 2020-04-23T03:47:25.78
IV.RM33.EHN. ML:0.0 0.000153774125 0.1184 AML other m 2020-04-23T03:47:25.87
IV.RM33.HNN. ML:0.0 0.000173680215 0.2016 AML other m 2020-04-23T03:47:25.87
IV.RM33.HNE. ML:0.0 0.00017338925 0.2784 AML other m 2020-04-23T03:47:29.07
IV.ARRO.EHE. ML:0.0 0.00008798916000000001 0.1984 AML other m 2020-04-23T03:47:29.34
IV.TERO.HHN. ML:0.0 0.0001345869 0.0576 AML other m 2020-04-23T03:47:29.39
IV.ARRO.EHN. ML:0.0 0.000060663725 0.1792 AML other m 2020-04-23T03:47:29.71
IV.TERO.HHE. ML:0.0 0.00019175379999999997 0.1408 AML other m 2020-04-23T03:47:29.73
IV.TERO.HNE. ML:0.0 0.00019600095000000002 0.0992 AML other m 2020-04-23T03:47:29.75
IV.CESI.HHN. ML:0.0 0.00013523974999999998 0.3616 AML other m 2020-04-23T03:47:29.64
IV.CESI.HNN. ML:0.0 0.0001558273 0.3584 AML other m 2020-04-23T03:47:29.65
IV.CESI.HHE. ML:0.0 0.000050148579999999995 0.1408 AML other m 2020-04-23T03:47:30.11
IV.TERO.HNN. ML:1.8 0.00020990579999999998 0.8 AML other m 2020-04-23T03:47:30.17
IV.MF5.EHE. ML:1.3 0.000063657781 0.3008 AML other m 2020-04-23T03:47:30.50
IV.GIGS.HHE. ML:0.0 0.000020472770000000003 2.2208 AML other m 2020-04-23T03:47:26.58
IV.GIGS.HHN. ML:0.0 0.000020966125 3.6608 AML other m 2020-04-23T03:47:47.98
IV.GUMA.HHE. ML:0.0 0.0002749514 0.24 AML other m 2020-04-23T03:47:31.65
IV.GUMA.HNN. ML:0.0 0.00019553510000000002 0.24 AML other m 2020-04-23T03:47:31.64
IV.CSP1.EHE. ML:0.0 0.000053303050000000005 0.1792 AML other m 2020-04-23T03:47:31.57
IV.GUMA.HNE. ML:0.0 0.00020431399999999998 0.2816 AML other m 2020-04-23T03:47:31.78
IV.GUMA.HHN. ML:0.0 0.00020766155 0.2208 AML other m 2020-04-23T03:47:31.78
IV.CSP1.EHN. ML:0.0 0.00007836751499999999 0.1984 AML other m 2020-04-23T03:47:32.93
IV.FIAM.HHE. ML:0.0 0.000037800300000000005 1.76 AML other m 2020-04-23T03:47:32.96
IV.FIAM.HHN. ML:0.0 0.000030290169999999998 1.76 AML other m 2020-04-23T03:47:32.10
IV.MOMA.HHN. ML:0.0 0.000081383125 0.2208 AML other m 2020-04-23T03:47:33.31
IV.MOMA.HNN. ML:0.0 0.000143904 0.272 AML other m 2020-04-23T03:47:33.73
IV.MOMA.HNE. ML:1.5 0.00009247816 0.16 AML other m 2020-04-23T03:47:34.04
IV.MOMA.HHE. ML:0.0 0.000100693985 1.8592 AML other m 2020-04-23T03:47:34.05
IV.MF5.EHN. ML:1.2 0.000059993185 0.3392 AML other m 2020-04-23T03:47:34.28
IV.CESX.HHE. ML:0.0 0.000048878935 1.5008 AML other m 2020-04-23T03:47:34.87
IV.CESX.HHN. ML:0.0 0.000054196394999999995 0.24 AML other m 2020-04-23T03:47:35.39
IV.MNTT.EHN. ML:0.0 0.000108550155 0.3392 AML other m 2020-04-23T03:47:37.47
IV.MNTT.EHE. ML:0.0 0.00009386496 1.68 AML other m 2020-04-23T03:47:38.06
IV.T0110.HHN. ML:0.0 0.00003270464 0.3776 AML other m 2020-04-23T03:47:43.03
IV.T0110.HHE. ML:0.0 0.000041526920000000005 0.8608 AML other m 2020-04-23T03:47:49.22
IV.CESI.HNE. ML:1.6 0.0001490419 2.24 AML other m 2020-04-23T03:47:38.91
IV.FIAM.HNN. ML:1.8 0.000163978 0.5184 AML other m 2020-04-23T03:47:47.94
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