Earthquake with magnitude of ML 1.0 on date 19-10-2021 and time 23:16:28 (UTC) in region 5 km SW Accumoli (RI)

A magnitude ML 1.0 earthquake occured in region: 5 km SW Accumoli (RI), on

  • 19-10-2021 23:16:28 (UTC)
  • 20-10-2021 01:16:28 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.6660, 13.1950 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.

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
Montereale AQ 16 2581 10782
Norcia PG 16 4957 15739
Posta RI 18 694 16433
Borbona RI 18 617 17050
Capitignano AQ 18 665 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)
86 Km W of Pescara (121014 inhabitants)
87 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 1.0 2021-10-19
23:16:28
42.6663 13.1952 13 2022-03-30
13:04:15
Bollettino Sismico Italiano INGV 97393931
Reviewed
Rev100
ML 1.0 2021-10-19
23:16:28
42.6623 13.1832 11 2021-10-19
23:28:05
Sala Sismica INGV-Roma 96776191
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-19 23:16:28 ± 0.07
Latitude 42.6663 ± 0.0027
Longitude 13.1952 ± 0.0037
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 97393931

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 236
Semi-minor axis of confidence ellipse (meter) 153
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 357
Circular confidence region, given by single value of horizontal uncertainty (meter) 240.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 66
Number of associated phases, regardless of their use for origin computation 26
Number of defining phases 26
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.15
Epicentral distance of station closest to the epicenter (degree) 0.07195
Epicentral distance of station farthest from the epicenter (degree) 0.54409
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 14
Magnitudes information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 97393931
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-11-11 09:31:21

ML:1.0

Field Value
Value 1.0
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 96776191
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-19 23:28:05
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ARRO.EHZ. 2021-10-19T23:16:40.58 0.3 undecidable manual S 255 36.3414 95 -0.14 70
IV.TERO.HHZ. 2021-10-19T23:16:39.77 0.3 undecidable manual S 98 33.744 96 -0.24 70
IV.ASSB.HHN. 2021-10-19T23:16:39.35 0.6 undecidable manual P 314 60.3951 93 0.09 46
IV.MMO1.EHZ. 2021-10-19T23:16:38.50 0.3 undecidable manual S 22 27.9498 98 0.01 74
IV.MOMA.HNZ. 2021-10-19T23:16:38.44 0.3 undecidable manual P 287 53.2023 93 0.28 67
IV.MC2.EHZ. 2021-10-19T23:16:38.59 0.3 undecidable manual S 359 27.1506 98 0.31 70
IV.GAVE.EHZ. 2021-10-19T23:16:37.54 0.3 undecidable manual S 277 24.753 100 -0.09 72
IV.CAMP.HHE. 2021-10-19T23:16:36.81 0.6 undecidable manual S 130 22.6551 102 -0.29 47
IV.MTRA.EHE. 2021-10-19T23:16:36.03 0.6 undecidable manual S 59 19.2696 106 -0.17 49
IV.LNSS.HHZ. 2021-10-19T23:16:35.01 0.3 undecidable manual S 241 14.4744 117 -0.02 74
IV.RM33.EHZ. 2021-10-19T23:16:35.68 0.6 undecidable manual S 175 17.5713 109 -0.09 49
IV.NRCA.HHZ. 2021-10-19T23:16:35.99 0.3 undecidable manual S 340 19.6692 106 -0.33 70
IV.TERO.HHZ. 2021-10-19T23:16:35.20 0.3 undecidable manual P 98 33.744 96 0.04 72
IV.ARRO.EHZ. 2021-10-19T23:16:35.53 0.3 undecidable manual P 255 36.3414 95 -0.04 72
IV.MMO1.EHZ. 2021-10-19T23:16:34.45 0.3 undecidable manual P 22 27.9498 98 0.17 71
IV.SMA1.EHZ. 2021-10-19T23:16:34.52 0.3 undecidable manual S 109 12.0768 124 0.04 76
IV.GAVE.EHZ. 2021-10-19T23:16:33.73 0.3 undecidable manual P 277 24.753 100 -0.06 73
IV.MC2.EHZ. 2021-10-19T23:16:33.91 0.3 undecidable manual P 359 27.1506 98 -0.26 70
IV.T1299.HNN. 2021-10-19T23:16:33.60 0.3 undecidable manual S 117 7.9809 140 -0.06 75
IV.CAMP.HHE. 2021-10-19T23:16:33.57 0.6 undecidable manual P 130 22.6551 102 0.09 49
IV.NRCA.HHZ. 2021-10-19T23:16:33.03 0.1 negative manual P 340 19.6692 106 0 100
IV.SMA1.EHZ. 2021-10-19T23:16:32.23 0.3 undecidable manual P 109 12.0768 124 0.26 72
IV.LNSS.HHZ. 2021-10-19T23:16:32.38 0.1 positive manual P 241 14.4744 117 0.1 100
IV.RM33.EHZ. 2021-10-19T23:16:32.80 0.3 undecidable manual P 175 17.5713 109 0.08 74
IV.MTRA.EHE. 2021-10-19T23:16:32.76 0.3 undecidable manual P 59 19.2696 106 -0.2 72
IV.T1299.HNN. 2021-10-19T23:16:31.71 0.1 undecidable manual P 117 7.9809 140 0.22 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SMA1.EHE. ML:1.3 0.000202 0.32 AML other m 2021-10-19T23:16:35.13
IV.SMA1.EHN. ML:1.3 0.0002035 0.38 AML other m 2021-10-19T23:16:35.19
IV.LNSS.HHN. ML:0.9 0.00006914999999999999 0.62 AML other m 2021-10-19T23:16:35.42
IV.LNSS.HHE. ML:0.9 0.0000726 0.18 AML other m 2021-10-19T23:16:35.83
IV.NRCA.HHE. ML:1.1 0.0000934 0.46 AML other m 2021-10-19T23:16:36.44
IV.NRCA.HHN. ML:1.0 0.0000699 0.08 AML other m 2021-10-19T23:16:36.61
IV.GAVE.EHE. ML:0.8 0.000038849999999999996 0.32 AML other m 2021-10-19T23:16:38.17
IV.GAVE.EHN. ML:0.8 0.000036849999999999994 0.98 AML other m 2021-10-19T23:16:38.77
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