Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 21-01-2020 and time 10:46:05 (Italy) in region 3 km SE Accumoli (RI)

A magnitude ML 1.6 earthquake occured in region: 3 km SE Accumoli (RI), on

  • 21-01-2020 09:46:05 (UTC)
  • 21-01-2020 10:46:05 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.6760, 13.2660 at 11 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.

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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 3 667 667
Amatrice RI 6 2657 3324
Cittareale RI 11 482 3806
Arquata del Tronto AP 11 1178 4984
Campotosto AQ 16 542 5526
Acquasanta Terme AP 16 2916 8442
Montereale AQ 17 2581 11023
Capitignano AQ 18 665 11688
Norcia PG 19 4957 16645
Montegallo AP 19 523 17168

Municipalities with at least 50000 inhabitants

An earthquake occurred to
36 Km W of Teramo (54892 inhabitants)
38 Km N of L'Aquila (69753 inhabitants)
52 Km E of Terni (111501 inhabitants)
55 Km SE of Foligno (57155 inhabitants)
75 Km W of Montesilvano (53738 inhabitants)
81 Km W of Pescara (121014 inhabitants)
82 Km W of Chieti (51815 inhabitants)
86 Km SE of Perugia (166134 inhabitants)
87 Km NE of Guidonia Montecelio (88673 inhabitants)
88 Km NE of Tivoli (56533 inhabitants)
99 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 1.6 2020-01-21
09:46:05		 42.6765 13.266 11 2020-07-18
21:08:19		 Bollettino Sismico Italiano INGV 75911821
Reviewed
Rev100 		ML 1.6 2020-01-21
09:46:05		 42.6803 13.2622 10 2020-01-21
09:50:55		 Sala Sismica INGV-Roma 75696501
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-01-21 09:46:05 ± 0.07
Latitude 42.6765 ± 0.0045
Longitude 13.2660 ± 0.0061
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 75911821

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 500
Semi-minor axis of confidence ellipse (meter) 410
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 255
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) 82
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) 0.32
Epicentral distance of station closest to the epicenter (degree) 0.04407
Epicentral distance of station farthest from the epicenter (degree) 0.42178
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:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 14
Type of magnitude ML
Reference to an origin 75911821
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-01-27 14:23:29

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 14
Type of magnitude ML
Reference to an origin 75696501
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-01-21 09:50:55
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MF5.EHZ. 2020-01-21T09:46:18.80 0.1 undecidable manual S 24 37.9287 50 0.84 76
IV.GIGS.HHZ. 2020-01-21T09:46:16.80 0.1 undecidable manual S 135 35.2425 50 -0.44 88
IV.GAVE.EHZ. 2020-01-21T09:46:15.80 0.1 undecidable manual S 273 30.3474 50 -0.14 92
IV.MC2.EHZ. 2020-01-21T09:46:15.10 0.3 undecidable manual S 346 26.8509 50 0.11 73
IV.MMO1.EHZ. 2020-01-21T09:46:14.10 0.1 undecidable manual S 11 25.2525 50 -0.46 89
IV.FDMO.HHN. 2020-01-21T09:46:13.79 0.1 undecidable manual P 340 42.5241 50 0.48 88
IV.LNSS.HHZ. 2020-01-21T09:46:13.20 0.1 undecidable manual S 246 20.1687 118 0 96
IV.CESI.HHE. 2020-01-21T09:46:13.65 0.1 undecidable manual P 321 46.8198 50 -0.32 87
IV.MF5.EHZ. 2020-01-21T09:46:13.10 0.1 undecidable manual P 24 37.9287 50 0.49 87
IV.GIGS.HHZ. 2020-01-21T09:46:12.04 0.1 undecidable manual P 135 35.2425 50 -0.15 93
IV.RM33.EHZ. 2020-01-21T09:46:12.90 0.1 undecidable manual S 193 19.0698 119 0.03 98
IV.NRCA.HHZ. 2020-01-21T09:46:12.90 0.3 undecidable manual S 325 21.3675 50 -0.64 61
IV.CAMP.HHE. 2020-01-21T09:46:12.70 0.1 undecidable manual S 143 19.4694 119 -0.3 94
IV.MTRA.EHZ. 2020-01-21T09:46:11.00 0.1 undecidable manual S 50 13.875 128 -0.37 96
IV.GAVE.EHZ. 2020-01-21T09:46:11.33 0.1 undecidable manual P 273 30.3474 50 -0.11 93
IV.MC2.EHZ. 2020-01-21T09:46:10.94 0.1 undecidable manual P 346 26.8509 50 0.05 99
IV.MMO1.EHZ. 2020-01-21T09:46:10.52 0.1 undecidable manual P 11 25.2525 50 -0.12 96
IV.NRCA.HHZ. 2020-01-21T09:46:09.94 0.1 positive manual P 325 21.3675 50 -0.11 96
IV.CAMP.HHE. 2020-01-21T09:46:09.78 0.1 undecidable manual P 143 19.4694 119 0.04 99
IV.T1299.HNN. 2020-01-21T09:46:09.60 0.1 undecidable manual S 164 4.8951 156 0.23 98
IV.SMA1.EHZ. 2020-01-21T09:46:09.70 0.1 undecidable manual S 132 7.5813 145 -0.14 100
IV.LNSS.HHZ. 2020-01-21T09:46:09.94 0.1 undecidable manual P 246 20.1687 118 0.08 99
IV.RM33.EHZ. 2020-01-21T09:46:09.82 0.1 undecidable manual P 193 19.0698 119 0.15 98
IV.MTRA.EHZ. 2020-01-21T09:46:08.80 0.1 undecidable manual P 50 13.875 128 0 100
IV.SMA1.EHZ. 2020-01-21T09:46:08.23 0.1 negative manual P 132 7.5813 145 0.31 96
IV.T1299.HNN. 2020-01-21T09:46:08.08 0.1 undecidable manual P 164 4.8951 156 0.44 94
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SMA1.EHN. ML:1.6 0.0004995 0.32 AML other m 2020-01-21T09:46:10.09
IV.SMA1.EHE. ML:1.6 0.0005805000000000001 0.58 AML other m 2020-01-21T09:46:10.33
IV.MTRA.EHN. ML:1.7 0.000523 0.36 AML other m 2020-01-21T09:46:11.26
IV.MTRA.HNN. ML:1.7 0.000488 0.24 AML other m 2020-01-21T09:46:11.56
IV.MTRA.HNE. ML:1.7 0.0005015000000000001 1.06 AML other m 2020-01-21T09:46:11.16
IV.MTRA.EHE. ML:1.7 0.000497 1.38 AML other m 2020-01-21T09:46:11.00
IV.RM33.EHN. ML:1.2 0.000129 0.64 AML other m 2020-01-21T09:46:13.33
IV.LNSS.HHN. ML:1.8 0.000484 0.16 AML other m 2020-01-21T09:46:13.46
IV.LNSS.HHE. ML:1.8 0.0005024999999999999 0.28 AML other m 2020-01-21T09:46:13.41
IV.RM33.EHE. ML:1.3 0.0001455 0.12 AML other m 2020-01-21T09:46:13.61
IV.NRCA.HHN. ML:1.6 0.000257 0.16 AML other m 2020-01-21T09:46:13.84
IV.NRCA.HHE. ML:1.7 0.0003735 1.28 AML other m 2020-01-21T09:46:14.32
IV.GAVE.EHN. ML:1.7 0.000216 1.1 AML other m 2020-01-21T09:46:16.70
IV.GAVE.EHE. ML:1.7 0.000232 0.7 AML other m 2020-01-21T09:46:16.42
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