Earthquake with magnitude of ML 0.6 on date 18-03-2021 and time 03:38:16 (Italy) in region 4 km W Accumoli (RI)

A magnitude ML 0.6 earthquake occured in region: 4 km W Accumoli (RI), on

  • 18-03-2021 02:38:16 (UTC)
  • 18-03-2021 03:38:16 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.6790, 13.2010 at 11 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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 4 667 667
Cittareale RI 8 482 1149
Amatrice RI 9 2657 3806
Arquata del Tronto AP 13 1178 4984
Norcia PG 15 4957 9941
Cascia PG 16 3217 13158
Montereale AQ 18 2581 15739
Posta RI 19 694 16433
Borbona RI 19 617 17050
Capitignano AQ 19 665 17715
Campotosto AQ 19 542 18257
Acquasanta Terme AP 20 2916 21173

Municipalities with at least 50000 inhabitants

An earthquake occurred to
40 Km NW of L'Aquila (69753 inhabitants)
41 Km W of Teramo (54892 inhabitants)
47 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)
85 Km NE of Guidonia Montecelio (88673 inhabitants)
86 Km NE of Tivoli (56533 inhabitants)
86 Km W of Pescara (121014 inhabitants)
87 Km W of Chieti (51815 inhabitants)
94 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
Reviewed
Rev100
ML 0.6 2021-03-18
02:38:16
42.6793 13.2007 11 2021-03-18
02:51:01
Sala Sismica INGV-Roma 88241421
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-03-18 02:38:16 ± 0.07
Latitude 42.6793 ± 0.0027
Longitude 13.2007 ± 0.0073
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 88241421

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 480
Semi-minor axis of confidence ellipse (meter) 367
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 90
Circular confidence region, given by single value of horizontal uncertainty (meter) 480.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 104
Number of associated phases, regardless of their use for origin computation 12
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.17
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.23832
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 5
Magnitude information

ML:0.6

Field Value
Value 0.6
Uncertainty 0.1
Num. used stations 4
Type of magnitude ML
Reference to an origin 88241421
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-03-18 02:51:01
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.APEC.HHZ. 2021-03-18T02:38:37.09 3.0 undecidable manual P 0 0
IV.MMO1.EHZ. 2021-03-18T02:38:26.45 0.1 undecidable manual S 23 26.4513 90 0 98
IV.RM33.EHZ. 2021-03-18T02:38:24.25 0.1 undecidable manual S 177 18.9699 90 -0.19 96
IV.NRCA.HNE. 2021-03-18T02:38:24.08 0.1 undecidable manual S 338 18.4704 90 -0.24 94
IV.TERO.HHZ. 2021-03-18T02:38:23.30 3.0 undecidable manual P -0.12 0
IV.LNSS.HHZ. 2021-03-18T02:38:23.64 0.1 undecidable manual S 237 15.5733 90 0.09 99
IV.MMO1.EHZ. 2021-03-18T02:38:22.34 0.1 undecidable manual P 23 26.4513 90 -0.09 96
IV.T1299.EHE. 2021-03-18T02:38:21.70 0.1 undecidable manual S 127 8.2806 129 -0.04 100
IV.NRCA.HNE. 2021-03-18T02:38:21.42 0.1 undecidable manual P 338 18.4704 90 0.22 96
IV.RM33.EHZ. 2021-03-18T02:38:21.29 0.1 undecidable manual P 177 18.9699 90 0.02 99
IV.LNSS.HHZ. 2021-03-18T02:38:20.81 0.1 undecidable manual P 237 15.5733 90 0.06 99
IV.T1299.EHE. 2021-03-18T02:38:19.84 0.1 undecidable manual P 127 8.2806 129 0.13 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LNSS.HHE. ML:0.6 0.000033145275 0.3008 AML other m 2021-03-18T02:38:23.70
IV.LNSS.HHN. ML:0.6 0.00003419082 0.1792 AML other m 2021-03-18T02:38:23.93
IV.RM33.EHE. ML:0.5 0.000024526305000000003 0.16 AML other m 2021-03-18T02:38:24.80
IV.RM33.EHN. ML:0.7 0.000039919305 0.16 AML other m 2021-03-18T02:38:24.60
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