Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 26-03-2020 and time 20:49:22 (UTC) in region 4 km SW Accumoli (RI)

A magnitude ML 1.4 earthquake occured in region: 4 km SW Accumoli (RI), on

  • 26-03-2020 20:49:22 (UTC)
  • 26-03-2020 21:49:22 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.6800, 13.2110 at 10 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.

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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 4 667 667
Cittareale RI 8 482 1149
Amatrice RI 8 2657 3806
Arquata del Tronto AP 13 1178 4984
Norcia PG 16 4957 9941
Cascia PG 17 3217 13158
Montereale AQ 17 2581 15739
Campotosto AQ 19 542 16281
Capitignano AQ 19 665 16946
Acquasanta Terme AP 19 2916 19862
Posta RI 20 694 20556
Borbona RI 20 617 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)
48 Km E of Terni (111501 inhabitants)
52 Km SE of Foligno (57155 inhabitants)
79 Km W of Montesilvano (53738 inhabitants)
82 Km SE of Perugia (166134 inhabitants)
85 Km NE of Guidonia Montecelio (88673 inhabitants)
86 Km W of Pescara (121014 inhabitants)
86 Km NE of Tivoli (56533 inhabitants)
87 Km W of Chieti (51815 inhabitants)
95 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 1.4 2020-03-26
20:49:22		 42.6798 13.2112 10 2020-03-26
20:53:24		 Sala Sismica INGV-Roma 77601841
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-03-26 20:49:22 ± 0.08
Latitude 42.6798 ± 0.0027
Longitude 13.2112 ± 0.0049
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 77601841

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 356
Semi-minor axis of confidence ellipse (meter) 232
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 283
Circular confidence region, given by single value of horizontal uncertainty (meter) 360.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 96
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 12
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) 0.23472
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 6
Magnitude information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 77601841
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-03-26 20:53:24
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.GUAR.HHZ. 2020-03-26T20:49:49.52 3.0 undecidable manual S -3.74 0
IV.SNTG.HHZ. 2020-03-26T20:49:44.61 3.0 undecidable manual S -0.07 0
IV.MMO1.EHZ. 2020-03-26T20:49:32.41 0.1 undecidable manual S 21 26.0517 50 -0.02 98
IV.MC2.EHZ. 2020-03-26T20:49:31.30 3.0 undecidable manual S -1.37 0
IV.NRCA.HHZ. 2020-03-26T20:49:30.20 0.1 undecidable manual S 335 18.7701 119 -0.06 98
IV.GIGS.HHZ. 2020-03-26T20:49:30.35 3.0 undecidable manual Pg 0.29 0
IV.RM33.EHZ. 2020-03-26T20:49:30.04 0.1 undecidable manual S 179 18.9699 119 -0.28 94
IV.TERO.HHZ. 2020-03-26T20:49:29.01 3.0 negative manual Pg -0.09 0
IV.LNSS.HHZ. 2020-03-26T20:49:29.53 0.1 undecidable manual S 239 16.3725 122 0 100
IV.MTRA.EHZ. 2020-03-26T20:49:29.58 0.1 undecidable manual S 61 17.3715 121 -0.25 95
IV.SMA1.EHZ. 2020-03-26T20:49:28.38 0.1 undecidable manual S 118 11.4774 132 0.19 97
IV.MMO1.EHZ. 2020-03-26T20:49:28.35 1.0 undecidable manual P 21 26.0517 50 -0.02 25
IV.RM33.EHZ. 2020-03-26T20:49:27.09 0.6 undecidable manual P 179 18.9699 119 -0.06 49
IV.NRCA.HHZ. 2020-03-26T20:49:27.24 0.3 negative manual P 335 18.7701 119 0.12 73
IV.MTRA.EHZ. 2020-03-26T20:49:26.90 0.1 positive manual P 61 17.3715 121 0.03 99
IV.SMA1.EHZ. 2020-03-26T20:49:26.15 0.1 undecidable manual P 118 11.4774 132 0.22 96
IV.LNSS.HHZ. 2020-03-26T20:49:26.81 0.3 positive manual P 239 16.3725 122 0.11 73
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SMA1.EHE. ML:1.7 0.0006465 0.3 AML other m 2020-03-26T20:49:28.83
IV.SMA1.EHN. ML:1.6 0.000413 0.24 AML other m 2020-03-26T20:49:29.48
IV.LNSS.HHE. ML:1.5 0.000282 0.32 AML other m 2020-03-26T20:49:29.81
IV.LNSS.HHN. ML:1.4 0.00019599999999999997 0.92 AML other m 2020-03-26T20:49:29.70
IV.RM33.EHN. ML:1.3 0.00014435 0.24 AML other m 2020-03-26T20:49:30.10
IV.RM33.EHE. ML:1.4 0.0001835 1.42 AML other m 2020-03-26T20:49:30.17
IV.NRCA.HHN. ML:1.2 0.00012385000000000003 0.36 AML other m 2020-03-26T20:49:30.60
IV.NRCA.HHE. ML:1.3 0.0001375 0.58 AML other m 2020-03-26T20:49:35.30
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