Earthquake with magnitude of ML 0.5 on date 17-02-2021 and time 08:40:08 (Italy) in region 5 km SW Accumoli (RI)

A magnitude ML 0.5 earthquake occured in region: 5 km SW Accumoli (RI), on

  • 17-02-2021 07:40:08 (UTC)
  • 17-02-2021 08:40:08 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.65, 13.228 at 12 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 5 667 667
Amatrice RI 6 2657 3324
Cittareale RI 7 482 3806
Montereale AQ 14 2581 6387
Arquata del Tronto AP 15 1178 7565
Campotosto AQ 16 542 8107
Capitignano AQ 16 665 8772
Borbona RI 17 617 9389
Posta RI 18 694 10083
Cascia PG 19 3217 13300
Norcia PG 19 4957 18257

Municipalities with at least 50000 inhabitants

An earthquake occurred to
36 Km NW of L'Aquila (69753 inhabitants)
39 Km W of Teramo (54892 inhabitants)
49 Km E of Terni (111501 inhabitants)
55 Km SE of Foligno (57155 inhabitants)
77 Km W of Montesilvano (53738 inhabitants)
83 Km NE of Guidonia Montecelio (88673 inhabitants)
83 Km W of Pescara (121014 inhabitants)
84 Km W of Chieti (51815 inhabitants)
84 Km NE of Tivoli (56533 inhabitants)
85 Km SE of Perugia (166134 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 0.5 2021-02-17
07:40:08
42.6497 13.2278 12 2021-07-12
16:54:59
Bollettino Sismico Italiano INGV 87405851
Reviewed
Rev100
ML 0.5 2021-02-17
07:40:09
42.6512 13.2547 5 2021-02-17
07:49:20
Sala Sismica INGV-Roma 87232821
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-02-17 07:40:08 ± 0.07
Latitude 42.6497 ± 0.0036
Longitude 13.2278 ± 0.0037
Depth (km) 12 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 87405851

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 363
Semi-minor axis of confidence ellipse (meter) 184
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 29
Circular confidence region, given by single value of horizontal uncertainty (meter) 360
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 73
Number of associated phases, regardless of their use for origin computation 31
Number of defining phases 19
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.18
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.44247
Number of stations at which the event was observed 23
Number of stations from which data was used for origin computation 11
Magnitudes information

ML:0.5

Field Value
Value 0.5
Uncertainty 0.1
Num. used stations 6
Type of magnitude ML
Reference to an origin 87405851
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-02-23 12:39:49

ML:0.5

Field Value
Value 0.5
Uncertainty 0.1
Num. used stations 3
Type of magnitude ML
Reference to an origin 87232821
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-02-17 07:49:20
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
ST.CARE.EHZ. 2021-02-17T07:41:46.65 3.0 undecidable manual Sn -1.9 0
IV.SPS2.HHZ. 2021-02-17T07:41:45.69 3.0 undecidable manual Sn 0.63 0
IV.GIZZ.HHZ. 2021-02-17T07:41:44.40 3.0 undecidable manual Sn -3.84 0
IV.MILN.HNZ. 2021-02-17T07:41:35.15 3.0 undecidable manual Sn -1.03 0
IV.OPPE.HHZ. 2021-02-17T07:41:22.67 3.0 undecidable manual Sn 1.41 0
IT.PLTA.HNZ. 2021-02-17T07:41:03.47 3.0 undecidable manual Sg 8.77 0
IV.SENI.HNZ. 2021-02-17T07:40:48.64 3.0 undecidable manual Sg -1.54 0
IV.APEC.HHZ. 2021-02-17T07:40:45.70 3.0 undecidable manual Sg 2.94 0
IV.CRTC.HHZ. 2021-02-17T07:40:42.90 3.0 undecidable manual Sn -6.09 0
IV.FIU.EHZ. 2021-02-17T07:40:39.30 3.0 undecidable manual Pg 7.25 0
IV.BOZZ.EHZ. 2021-02-17T07:40:37.31 3.0 negative manual Pn -2.71 0
IV.TERO.HHZ. 2021-02-17T07:40:19.02 0.3 undecidable manual S 95 0.2779 94 -0.13 74
IV.GAVE.HNZ. 2021-02-17T07:40:18.35 0.3 undecidable manual S 280 0.2491 94 0.05 75
IV.MMO1.EHZ. 2021-02-17T07:40:18.88 0.3 undecidable manual S 16 0.2599 94 0.26 72
IV.CSP1.EHZ. 2021-02-17T07:40:17.40 0.6 undecidable manual P 358 0.4425 92 -0.04 49
IV.NRCA.HHZ. 2021-02-17T07:40:16.79 0.3 undecidable manual S 336 0.2014 97 -0.12 76
IV.MF5.EHZ. 2021-02-17T07:40:16.56 1.0 undecidable manual P 27 0.3786 92 0.21 24
IV.LNSS.HHZ. 2021-02-17T07:40:15.44 0.3 undecidable manual S 251 0.1457 106 0.16 75
IV.ARRO.EHZ. 2021-02-17T07:40:15.39 0.3 undecidable manual P 258 0.3471 92 -0.43 69
IV.TERO.HHZ. 2021-02-17T07:40:14.70 0.1 undecidable manual P 95 0.2779 94 0.07 100
IV.RM33.EHZ. 2021-02-17T07:40:14.95 0.3 undecidable manual S 184 0.1412 107 -0.19 75
IV.GAVE.HNZ. 2021-02-17T07:40:14.21 0.6 undecidable manual P 280 0.2491 94 0.07 50
IV.MMO1.EHZ. 2021-02-17T07:40:14.12 0.3 undecidable manual P 16 0.2599 94 -0.21 73
IV.NRCA.HHZ. 2021-02-17T07:40:13.06 0.6 undecidable manual P 336 0.2014 97 -0.28 49
IV.SMA1.EHZ. 2021-02-17T07:40:13.66 0.3 undecidable manual S 104 0.0809 132 0.06 78
IV.RM33.EHZ. 2021-02-17T07:40:12.46 0.3 undecidable manual P 184 0.1412 107 0.14 76
IV.LNSS.HHZ. 2021-02-17T07:40:12.59 0.3 positive manual P 251 0.1457 106 0.2 75
IV.VIVA.HHZ. 2021-02-17T07:40:12.73 3.0 positive manual Pn 1.66 0
IV.T1299.HNZ. 2021-02-17T07:40:12.60 0.3 undecidable manual S 111 0.0432 153 -0.3 74
IV.SMA1.EHZ. 2021-02-17T07:40:11.74 0.3 undecidable manual P 104 0.0809 132 0.32 74
IV.T1299.HNZ. 2021-02-17T07:40:11.20 0.3 undecidable manual P 111 0.0432 153 0.18 77
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.RM33.EHE. ML:0.7 3.82E-5 0.92 AML other m 2021-02-17T07:40:15.74
IV.RM33.EHN. ML:0.6 3.675E-5 0.4 AML other m 2021-02-17T07:40:15.82
IV.LNSS.HHE. ML:0.5 2.6480295E-5 0.4768 AML other m 2021-02-17T07:40:16.03
IV.LNSS.HHN. ML:0.5 2.316197E-5 0.3776 AML other m 2021-02-17T07:40:15.62
IV.TERO.HHE. ML:0.3 1.1346735E-5 0.64 AML other m 2021-02-17T07:40:20.05
IV.TERO.HHN. ML:0.6 2.0970405E-5 0.9216 AML other m 2021-02-17T07:40:19.17
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