Earthquake with magnitude of ML 1.1 on date 01-04-2023 and time 01:23:28 (UTC) in region 6 km W Accumoli (RI)

A magnitude ML 1.1 earthquake occured in region: 6 km W Accumoli (RI), on

  • 01-04-2023 01:23:28 (UTC)
  • 01-04-2023 03:23:28 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.6800, 13.1840 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 6 667 667
Cittareale RI 7 482 1149
Amatrice RI 10 2657 3806
Arquata del Tronto AP 14 1178 4984
Cascia PG 15 3217 8201
Norcia PG 15 4957 13158
Montereale AQ 18 2581 15739
Posta RI 19 694 16433
Borbona RI 19 617 17050
Monteleone di Spoleto PG 19 599 17649

Municipalities with at least 50000 inhabitants

An earthquake occurred to
41 Km NW of L'Aquila (69753 inhabitants)
43 Km W of Teramo (54892 inhabitants)
46 Km E of Terni (111501 inhabitants)
50 Km SE of Foligno (57155 inhabitants)
80 Km SE of Perugia (166134 inhabitants)
81 Km W of Montesilvano (53738 inhabitants)
84 Km NE of Guidonia Montecelio (88673 inhabitants)
86 Km NE of Tivoli (56533 inhabitants)
88 Km W of Pescara (121014 inhabitants)
89 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 1.1 2023-04-01
01:23:28
42.6797 13.1845 10 2024-03-01
17:18:02
Bollettino Sismico Italiano INGV 116120601
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-04-01 01:23:28 ± 0.14
Latitude 42.6797 ± 0.0090
Longitude 13.1845 ± 0.0110
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 116120601

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 858
Semi-minor axis of confidence ellipse (meter) 837
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 93
Circular confidence region, given by single value of horizontal uncertainty (meter) 860.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 94
Number of associated phases, regardless of their use for origin computation 20
Number of defining phases 11
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) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.38401
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 6
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.1
Num. used stations 2
Type of magnitude ML
Reference to an origin 116120601
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2023-04-06 16:01:23
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SERS.HHZ. 2023-04-01T01:25:03.63 3.0 undecidable manual Sn -0.62 0
IV.MSRU.HHZ. 2023-04-01T01:25:02.24 3.0 undecidable manual Sn -9.99 0
CH.BERNI.HHZ. 2023-04-01T01:24:33.17 3.0 undecidable manual Pg 21.27 0
IV.AIO.HHZ. 2023-04-01T01:24:24.17 3.0 undecidable manual Pn 5.49 0
IV.MABI.HHZ. 2023-04-01T01:24:19.07 3.0 undecidable manual Pn 13.38 0
IV.MSRU.HHZ. 2023-04-01T01:24:16.96 3.0 undecidable manual Pn 1.35 0
IV.MCRV.HHZ. 2023-04-01T01:24:13.89 3.0 undecidable manual Sn -6.34 0
IV.GRI.EHZ. 2023-04-01T01:24:10.77 3.0 positive manual Pn -1.08 0
IV.MCEL.HHZ. 2023-04-01T01:23:52.59 3.0 undecidable manual Pn -0.18 0
IV.MMO1.EHZ. 2023-04-01T01:23:37.91 0.3 undecidable manual S 25 26.9508 50 -0.45 67
IV.CESI.HHE. 2023-04-01T01:23:36.51 0.3 undecidable manual P 328 42.624 50 -0.08 71
IV.NRCA.HHZ. 2023-04-01T01:23:35.33 0.6 undecidable manual S 341 17.9709 119 -0.27 47
IV.RM33.HNZ. 2023-04-01T01:23:35.64 0.3 undecidable manual S 173 19.0698 118 -0.3 70
IV.MMO1.EHZ. 2023-04-01T01:23:35.02 0.3 undecidable manual P 25 26.9508 50 0.84 58
IV.SMA1.EHZ. 2023-04-01T01:23:34.31 0.1 undecidable manual S 114 13.4754 127 0.04 100
IV.LNSS.HHZ. 2023-04-01T01:23:34.74 0.3 undecidable manual S 234 14.5743 124 0.16 73
IV.LNSS.HHZ. 2023-04-01T01:23:32.10 0.3 undecidable manual P 234 14.5743 124 0.11 74
IV.NRCA.HHZ. 2023-04-01T01:23:32.52 1.0 undecidable manual P 341 17.9709 119 -0.06 25
IV.SMA1.EHZ. 2023-04-01T01:23:32.06 0.3 undecidable manual P 114 13.4754 127 0.24 72
IV.RM33.HNZ. 2023-04-01T01:23:32.38 0.6 undecidable manual P 173 19.0698 118 -0.4 46
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SMA1.EHE. ML:1.2 0.0001535 0.24 AML other m 2023-04-01T01:23:34.83
IV.SMA1.EHN. ML:1.0 0.0000981 1.02 AML other m 2023-04-01T01:23:35.84
IV.LNSS.HHE. ML:0.0 0.00010502237 0.36 AML other m 2023-04-01T01:23:35.00
IV.LNSS.HHN. ML:0.0 0.00007729027499999999 0.2 AML other m 2023-04-01T01:23:35.16
IV.RM33.EHN. ML:0.0 0.000045470735 10.12 AML other m 2023-04-01T01:23:35.68
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