Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 27-07-2020 and time 02:55:51 (UTC) in region 6 km SW Accumoli (RI)

A magnitude ML 1.5 earthquake occured in region: 6 km SW Accumoli (RI), on

  • 27-07-2020 02:55:51 (UTC)
  • 27-07-2020 04:55:51 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.6680, 13.1910 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
Accumoli RI 6 667 667
Cittareale RI 6 482 1149
Amatrice RI 9 2657 3806
Arquata del Tronto AP 15 1178 4984
Cascia PG 16 3217 8201
Norcia PG 16 4957 13158
Montereale AQ 17 2581 15739
Posta RI 18 694 16433
Borbona RI 18 617 17050
Capitignano AQ 19 665 17715
Campotosto AQ 19 542 18257
Monteleone di Spoleto PG 20 599 18856

Municipalities with at least 50000 inhabitants

An earthquake occurred to
39 Km NW of L'Aquila (69753 inhabitants)
42 Km W of Teramo (54892 inhabitants)
46 Km E of Terni (111501 inhabitants)
51 Km SE of Foligno (57155 inhabitants)
80 Km W of Montesilvano (53738 inhabitants)
82 Km SE of Perugia (166134 inhabitants)
83 Km NE of Guidonia Montecelio (88673 inhabitants)
85 Km NE of Tivoli (56533 inhabitants)
87 Km W of Pescara (121014 inhabitants)
88 Km W of Chieti (51815 inhabitants)
93 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 2020-07-27
02:55:51		 42.6678 13.1907 13 2020-11-19
12:36:54		 Bollettino Sismico Italiano INGV 81414131
Reviewed
Rev100 		ML 1.5 2020-07-27
02:55:51		 42.6697 13.2017 15 2020-07-27
03:00:23		 Sala Sismica INGV-Roma 81391681
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-07-27 02:55:51 ± 0.07
Latitude 42.6678 ± 0.0036
Longitude 13.1907 ± 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 81414131

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 420
Semi-minor axis of confidence ellipse (meter) 177
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 242
Circular confidence region, given by single value of horizontal uncertainty (meter) 420.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 56
Number of associated phases, regardless of their use for origin computation 37
Number of defining phases 35
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.28
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.66100
Number of stations at which the event was observed 23
Number of stations from which data was used for origin computation 22
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 30
Type of magnitude ML
Reference to an origin 81414131
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-09-17 15:34:51

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 30
Type of magnitude ML
Reference to an origin 81391681
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-07-27 03:00:23
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ROSPO.HHZ. 2020-07-27T02:56:33.02 3.0 undecidable manual S -0.84 0
IV.ROSPO.HHZ. 2020-07-27T02:56:18.95 3.0 undecidable manual P 3.76 0
IV.CSP1.EHZ. 2020-07-27T02:56:06.78 0.6 undecidable manual S 1 47.0196 94 0.15 47
IV.MF5.EHZ. 2020-07-27T02:56:06.12 0.1 undecidable manual S 32 41.7249 95 0.92 74
IV.FDMO.HHZ. 2020-07-27T02:56:05.07 0.1 undecidable manual S 348 41.7249 95 -0.15 92
IV.SRES.HHZ. 2020-07-27T02:56:04.89 0.3 undecidable manual P 230 73.371 92 0.56 60
IV.T0110.HHZ. 2020-07-27T02:56:03.36 0.1 undecidable manual P 135 68.2761 92 -0.18 89
IV.ARRO.EHZ. 2020-07-27T02:56:03.74 0.3 undecidable manual S 254 36.0417 96 0.03 72
IV.VCEL.EHZ. 2020-07-27T02:56:02.62 0.1 undecidable manual P 119 61.1943 93 0.17 89
IV.ASSB.HHZ. 2020-07-27T02:56:02.34 0.1 undecidable manual P 314 59.9955 93 0.07 92
IV.TERO.HHZ. 2020-07-27T02:56:02.54 0.3 undecidable manual S 98 34.0437 96 -0.64 63
IV.MNTT.EHZ. 2020-07-27T02:56:02.04 0.1 undecidable manual P 37 54.7008 93 0.58 82
IV.OFFI.HHZ. 2020-07-27T02:56:01.47 0.3 undecidable manual P 53 50.0166 94 0.74 58
IV.MC2.EHZ. 2020-07-27T02:56:01.42 0.3 undecidable manual S 360 27.0507 99 0.11 73
IV.MMO1.EHZ. 2020-07-27T02:56:01.32 0.3 undecidable manual S 23 27.9498 99 -0.24 70
IV.FAGN.HHZ. 2020-07-27T02:56:01.18 0.3 undecidable manual P 144 55.0005 93 -0.32 66
IV.GAVE.EHZ. 2020-07-27T02:56:00.62 0.3 undecidable manual S 276 24.3534 101 0.01 74
IV.FDMO.HHZ. 2020-07-27T02:55:59.31 0.1 undecidable manual P 348 41.7249 95 -0.15 92
IV.MF5.EHZ. 2020-07-27T02:55:59.64 0.1 undecidable manual P 32 41.7249 95 0.19 93
IV.CESI.HHZ. 2020-07-27T02:55:59.72 0.3 undecidable manual P 328 44.0226 94 -0.09 70
IV.CSP1.EHZ. 2020-07-27T02:55:59.78 0.3 undecidable manual P 1 47.0196 94 -0.49 64
IV.NRCA.HHZ. 2020-07-27T02:55:58.87 0.1 undecidable manual S 341 19.3695 107 -0.46 89
IV.ARRO.EHZ. 2020-07-27T02:55:58.64 0.3 undecidable manual P 254 36.0417 96 0.05 72
IV.LNSS.HHZ. 2020-07-27T02:55:58.17 0.1 undecidable manual S 240 14.2746 119 0.11 98
IV.RM33.EHZ. 2020-07-27T02:55:58.83 0.1 undecidable manual S 174 17.7711 110 -0.08 100
IV.TERO.HHZ. 2020-07-27T02:55:58.07 0.3 undecidable manual P 98 34.0437 96 -0.22 70
IV.SMA1.EHZ. 2020-07-27T02:55:57.48 0.1 undecidable manual S 109 12.4764 124 -0.18 98
IV.MC2.EHZ. 2020-07-27T02:55:57.20 0.1 undecidable manual P 360 27.0507 99 0 98
IV.MMO1.EHZ. 2020-07-27T02:55:57.17 0.1 undecidable manual P 23 27.9498 99 -0.18 94
IV.T1299.HNN. 2020-07-27T02:55:56.51 0.6 undecidable manual S 117 8.3805 139 -0.33 48
IV.GAVE.EHZ. 2020-07-27T02:55:56.79 0.1 undecidable manual P 276 24.3534 101 -0.01 99
IV.CAMP.HHZ. 2020-07-27T02:55:56.48 0.1 negative manual P 129 23.0547 102 -0.13 97
IV.LNSS.HHZ. 2020-07-27T02:55:55.46 0.1 positive manual P 240 14.2746 119 0.13 98
IV.RM33.EHZ. 2020-07-27T02:55:55.88 0.1 undecidable manual P 174 17.7711 110 0.06 98
IV.NRCA.HHZ. 2020-07-27T02:55:55.93 0.1 negative manual P 341 19.3695 107 -0.13 97
IV.SMA1.EHZ. 2020-07-27T02:55:55.14 0.1 undecidable manual P 109 12.4764 124 0.04 100
IV.T1299.HNN. 2020-07-27T02:55:54.70 0.1 undecidable manual P 117 8.3805 139 0.08 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SMA1.EHN. ML:2.2 0.001545 1.78 AML other m 2020-07-27T02:55:57.09
IV.LNSS.HHE. ML:1.7 0.00044750000000000004 0.32 AML other m 2020-07-27T02:55:58.27
IV.LNSS.HHN. ML:1.9 0.0006835 0.38 AML other m 2020-07-27T02:55:58.50
IV.SMA1.EHE. ML:1.9 0.0007375000000000001 0.2 AML other m 2020-07-27T02:55:58.67
IV.NRCA.HHN. ML:1.8 0.00040800000000000005 0.1 AML other m 2020-07-27T02:55:59.18
IV.NRCA.HHE. ML:2.1 0.0009565000000000001 0.16 AML other m 2020-07-27T02:55:59.37
IV.RM33.EHN. ML:1.7 0.000365 0.4 AML other m 2020-07-27T02:55:59.83
IV.RM33.HNE. ML:1.9 0.0006365 0.14 AML other m 2020-07-27T02:55:59.77
IV.RM33.EHE. ML:1.9 0.0006285 0.14 AML other m 2020-07-27T02:55:59.77
IV.RM33.HNN. ML:1.7 0.000398 0.14 AML other m 2020-07-27T02:55:59.83
IV.CAMP.HHE. ML:0.8 0.00003705 0.62 AML other m 2020-07-27T02:56:00.49
IV.GAVE.EHN. ML:1.9 0.000461 1.86 AML other m 2020-07-27T02:56:01.96
IV.GAVE.EHE. ML:1.9 0.000484 0.12 AML other m 2020-07-27T02:56:01.35
IV.CAMP.HHN. ML:0.8 0.0000336 0.52 AML other m 2020-07-27T02:56:02.61
IV.TERO.HHN. ML:1.6 0.00016049999999999997 0.06 AML other m 2020-07-27T02:56:02.80
IV.TERO.HHE. ML:1.4 0.0001019 0.48 AML other m 2020-07-27T02:56:02.80
IV.ARRO.EHN. ML:1.3 0.00007585 0.88 AML other m 2020-07-27T02:56:04.76
IV.FDMO.HHN. ML:1.2 0.00005595 0.26 AML other m 2020-07-27T02:56:05.48
IV.ARRO.EHE. ML:1.3 0.00006825 0.58 AML other m 2020-07-27T02:56:05.82
IV.FDMO.HHE. ML:1.0 0.00003715 0.5 AML other m 2020-07-27T02:56:05.95
IV.CESI.HHE. ML:1.0 0.000029199999999999998 0.74 AML other m 2020-07-27T02:56:06.52
IV.CESI.HHN. ML:1.3 0.0000659 0.36 AML other m 2020-07-27T02:56:06.54
IV.ASSB.HHE. ML:1.1 0.000027400000000000002 0.86 AML other m 2020-07-27T02:56:12.79
IV.ASSB.HHN. ML:1.2 0.0000284 0.64 AML other m 2020-07-27T02:56:12.50
IV.FAGN.HHN. ML:1.2 0.000038150000000000006 1.34 AML other m 2020-07-27T02:56:12.88
IV.VCEL.EHE. ML:1.3 0.000039800000000000005 1.46 AML other m 2020-07-27T02:56:13.01
IV.VCEL.EHN. ML:1.4 0.0000543 0.68 AML other m 2020-07-27T02:56:13.61
IV.FAGN.HHE. ML:1.3 0.000044200000000000004 0.36 AML other m 2020-07-27T02:56:14.72
IV.T0110.HHN. ML:1.2 0.00002775 0.32 AML other m 2020-07-27T02:56:16.76
IV.T0110.HHE. ML:1.2 0.00002755 1.14 AML other m 2020-07-27T02:56:18.16
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