Earthquake with magnitude of ML 1.5 on date 16-09-2021 and time 00:57:40 (Italy) in region 1 km SW Accumoli (RI)

A magnitude ML 1.5 earthquake occured in region: 1 km SW Accumoli (RI), on

  • 15-09-2021 22:57:40 (UTC)
  • 16-09-2021 00:57:40 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.6840, 13.2430 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.

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 1 667 667
Amatrice RI 7 2657 3324
Cittareale RI 10 482 3806
Arquata del Tronto AP 11 1178 4984
Acquasanta Terme AP 17 2916 7900
Norcia PG 17 4957 12857
Campotosto AQ 18 542 13399
Montereale AQ 18 2581 15980
Capitignano AQ 19 665 16645
Cascia PG 19 3217 19862
Montegallo AP 19 523 20385

Municipalities with at least 50000 inhabitants

An earthquake occurred to
38 Km W of Teramo (54892 inhabitants)
39 Km NW of L'Aquila (69753 inhabitants)
51 Km E of Terni (111501 inhabitants)
53 Km SE of Foligno (57155 inhabitants)
77 Km W of Montesilvano (53738 inhabitants)
83 Km W of Pescara (121014 inhabitants)
84 Km SE of Perugia (166134 inhabitants)
84 Km W of Chieti (51815 inhabitants)
87 Km NE of Guidonia Montecelio (88673 inhabitants)
88 Km NE of Tivoli (56533 inhabitants)
98 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 2021-09-15
22:57:40
42.6842 13.2428 10 2022-03-30
13:04:40
Bollettino Sismico Italiano INGV 101755381
Reviewed
Rev100
ML 1.5 2021-09-15
22:57:40
42.6897 13.2317 9 2021-09-15
23:04:12
Sala Sismica INGV-Roma 95482651
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-15 22:57:40 ± 0.07
Latitude 42.6842 ± 0.0045
Longitude 13.2428 ± 0.0061
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 101755381

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 499
Semi-minor axis of confidence ellipse (meter) 410
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 239
Circular confidence region, given by single value of horizontal uncertainty (meter) 500.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 54
Number of associated phases, regardless of their use for origin computation 36
Number of defining phases 36
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.33
Epicentral distance of station closest to the epicenter (degree) 0.05756
Epicentral distance of station farthest from the epicenter (degree) 0.60075
Number of stations at which the event was observed 20
Number of stations from which data was used for origin computation 20
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 21
Type of magnitude ML
Reference to an origin 95482651
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-15 23:04:12

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 21
Type of magnitude ML
Reference to an origin 101755381
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-03-07 11:42:45
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MOMA.HHZ. 2021-09-15T22:57:59.25 0.6 undecidable manual S 284 56.3991 50 0.76 38
IV.GUMA.HHZ. 2021-09-15T22:57:55.39 0.3 undecidable manual S 10 42.624 50 0.57 63
IV.CSP1.EHZ. 2021-09-15T22:57:55.33 0.6 undecidable manual S 356 45.3213 50 -0.21 46
IV.CESI.HHZ. 2021-09-15T22:57:55.91 0.3 undecidable manual S 322 45.0216 50 0.47 65
IV.MF5.EHZ. 2021-09-15T22:57:54.15 0.6 undecidable manual S 28 38.0286 50 0.56 42
IV.T0110.HHZ. 2021-09-15T22:57:52.23 0.3 undecidable manual P 139 66.6777 50 -0.32 64
IV.MOMA.HHZ. 2021-09-15T22:57:51.82 0.3 undecidable manual P 284 56.3991 50 0.86 55
IV.GAVE.EHZ. 2021-09-15T22:57:50.42 0.6 undecidable manual S 272 28.4493 50 -0.6 43
IV.MNTT.EHZ. 2021-09-15T22:57:50.72 0.3 undecidable manual P 34 50.8158 50 0.62 61
IV.TERO.HHZ. 2021-09-15T22:57:50.67 0.6 undecidable manual S 103 30.2475 50 -0.83 39
IV.MML1.EHZ. 2021-09-15T22:57:50.05 0.3 undecidable manual P 335 52.503 50 -0.31 66
IV.MC2.EHZ. 2021-09-15T22:57:50.06 0.6 undecidable manual S 350 25.5522 111 -0.12 48
IV.OFFI.HHZ. 2021-09-15T22:57:49.92 0.1 negative manual P 52 45.5211 50 0.63 82
IV.MMO1.EHZ. 2021-09-15T22:57:49.53 0.6 undecidable manual S 16 24.8529 111 -0.41 45
IV.MF5.EHZ. 2021-09-15T22:57:48.23 0.1 undecidable manual P 28 38.0286 50 0.1 95
IV.NRCA.HNZ. 2021-09-15T22:57:48.00 0.6 undecidable manual S 328 19.5693 116 -0.28 47
IV.CESI.HHZ. 2021-09-15T22:57:48.82 0.1 undecidable manual P 322 45.0216 50 -0.38 88
IV.RM33.EHZ. 2021-09-15T22:57:48.14 0.3 undecidable manual S 187 19.5693 116 -0.12 73
IV.CAMP.HHE. 2021-09-15T22:57:48.49 0.6 undecidable manual S 140 21.3675 115 -0.32 47
IV.GUMA.HHZ. 2021-09-15T22:57:48.88 0.6 undecidable manual P 10 42.624 50 0.04 95
IV.CSP1.EHZ. 2021-09-15T22:57:48.94 0.1 undecidable manual P 356 45.3213 50 -0.32 89
IV.LNSS.HHZ. 2021-09-15T22:57:48.07 0.6 undecidable manual S 241 18.87 117 0.04 50
IV.GAVE.EHZ. 2021-09-15T22:57:46.33 0.1 undecidable manual P 272 28.4493 50 -0.32 92
IV.TERO.HHZ. 2021-09-15T22:57:46.46 0.1 undecidable manual P 103 30.2475 50 -0.47 89
IV.MTRA.EHE. 2021-09-15T22:57:46.71 0.3 undecidable manual S 57 14.874 123 -0.14 73
IV.MMO1.EHZ. 2021-09-15T22:57:45.72 0.1 undecidable manual P 16 24.8529 111 -0.31 93
IV.MC2.EHZ. 2021-09-15T22:57:45.92 0.3 undecidable manual P 350 25.5522 111 -0.24 71
IV.SMA1.EHZ. 2021-09-15T22:57:45.58 0.3 undecidable manual S 128 9.5793 135 0.15 74
IV.T1299.HNN. 2021-09-15T22:57:45.19 0.3 undecidable manual S 150 6.3936 147 0.46 70
IV.RM33.EHZ. 2021-09-15T22:57:45.07 0.6 positive manual P 187 19.5693 116 0.01 75
IV.CAMP.HHE. 2021-09-15T22:57:45.24 0.1 undecidable manual P 140 21.3675 115 -0.14 97
IV.LNSS.HHZ. 2021-09-15T22:57:44.92 0.1 undecidable manual P 241 18.87 117 0 100
IV.MTRA.EHE. 2021-09-15T22:57:44.28 0.1 undecidable manual P 57 14.874 123 0.04 100
IV.NRCA.HNZ. 2021-09-15T22:57:44.97 0.1 negative manual P 328 19.5693 116 -0.1 98
IV.SMA1.EHZ. 2021-09-15T22:57:43.73 0.1 negative manual P 128 9.5793 135 0.31 95
IV.T1299.HNN. 2021-09-15T22:57:43.46 0.1 undecidable manual P 150 6.3936 147 0.45 93
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SMA1.EHN. ML:1.3 0.00026000000000000003 0.18 AML other m 2021-09-15T22:57:45.80
IV.SMA1.EHE. ML:1.4 0.0002965 0.24 AML other m 2021-09-15T22:57:46.36
IV.NRCA.HHN. ML:1.9 0.0006795 0.14 AML other m 2021-09-15T22:57:48.21
IV.NRCA.HHE. ML:2.0 0.000722 0.14 AML other m 2021-09-15T22:57:48.16
IV.RM33.EHN. ML:1.5 0.0002275 0.2 AML other m 2021-09-15T22:57:48.41
IV.LNSS.HHE. ML:1.4 0.00017549999999999998 0.26 AML other m 2021-09-15T22:57:48.61
IV.LNSS.HHN. ML:1.6 0.0003345 0.38 AML other m 2021-09-15T22:57:48.32
IV.RM33.EHE. ML:1.5 0.00022899999999999998 1.06 AML other m 2021-09-15T22:57:48.45
IV.GAVE.EHN. ML:1.7 0.0002845 1.22 AML other m 2021-09-15T22:57:51.80
IV.GAVE.EHE. ML:1.6 0.00019800000000000002 1.36 AML other m 2021-09-15T22:57:51.26
IV.GUMA.HHE. ML:2.1 0.0004325 0.24 AML other m 2021-09-15T22:57:55.66
IV.CSP1.EHN. ML:1.6 0.00012992935 0.448 AML other m 2021-09-15T22:57:55.97
IV.GUMA.HHN. ML:1.8 0.0002155 0.4 AML other m 2021-09-15T22:57:56.09
IV.CESI.HHE. ML:0.9 0.00002615 0.12 AML other m 2021-09-15T22:57:56.34
IV.CSP1.EHE. ML:1.5 0.00009814348 1.1296 AML other m 2021-09-15T22:57:57.89
IV.CESI.HHN. ML:1.1 0.00003375 0.6 AML other m 2021-09-15T22:57:57.66
IV.OFFI.HHN. ML:1.4 0.00007395000000000001 0.64 AML other m 2021-09-15T22:57:58.81
IV.MML1.EHE. ML:1.0 0.0000229 0.58 AML other m 2021-09-15T22:57:58.25
IV.MOMA.HHN. ML:1.3 0.00004285 0.26 AML other m 2021-09-15T22:57:59.65
IV.MOMA.HHE. ML:1.2 0.00004035 0.86 AML other m 2021-09-15T22:58:00.46
IV.MML1.EHN. ML:1.0 0.0000246 0.26 AML other m 2021-09-15T22:58:00.10
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