Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.8 on date 23-02-2020 and time 19:05:47 (Italy) in region 5 km W Amatrice (RI)

A magnitude ML 0.8 earthquake occured in region: 5 km W Amatrice (RI), on

  • 23-02-2020 18:05:47 (UTC)
  • 23-02-2020 19:05:47 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.6300, 13.2340 at 14 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
Amatrice RI 5 2657 2657
Cittareale RI 6 482 3139
Accumoli RI 7 667 3806
Montereale AQ 12 2581 6387
Capitignano AQ 13 665 7052
Campotosto AQ 14 542 7594
Borbona RI 15 617 8211
Posta RI 16 694 8905
Arquata del Tronto AP 17 1178 10083
Cagnano Amiterno AQ 19 1369 11452

Municipalities with at least 50000 inhabitants

An earthquake occurred to
34 Km NW of L'Aquila (69753 inhabitants)
39 Km W of Teramo (54892 inhabitants)
49 Km E of Terni (111501 inhabitants)
57 Km SE of Foligno (57155 inhabitants)
76 Km W of Montesilvano (53738 inhabitants)
81 Km NE of Guidonia Montecelio (88673 inhabitants)
82 Km NE of Tivoli (56533 inhabitants)
82 Km W of Pescara (121014 inhabitants)
83 Km W of Chieti (51815 inhabitants)
87 Km SE of Perugia (166134 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 0.8 2020-02-23
18:05:47		 42.6298 13.2342 14 2020-02-23
18:13:13		 Sala Sismica INGV-Roma 76760111
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-02-23 18:05:47 ± 0.08
Latitude 42.6298 ± 0.0036
Longitude 13.2342 ± 0.0049
Depth (km) 14 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 76760111

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 402
Semi-minor axis of confidence ellipse (meter) 240
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 34
Circular confidence region, given by single value of horizontal uncertainty (meter) 400.0
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 15
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.14
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.27789
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 7
Magnitude information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.2
Num. used stations 9
Type of magnitude ML
Reference to an origin 76760111
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-02-23 18:13:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.LAV9.HNZ. 2020-02-23T18:06:01.40 3.0 undecidable manual P -0.43 0
IV.MMO1.HNE. 2020-02-23T18:05:58.18 0.3 undecidable manual S 14 30.8469 99 -0.07 96
IV.TERO.HHZ. 2020-02-23T18:05:57.81 0.3 undecidable manual S 91 30.1476 99 -0.27 92
IV.GAVE.HNZ. 2020-02-23T18:05:57.63 0.6 undecidable manual S 284 28.5492 100 -0.03 64
IV.NRCA.HHZ. 2020-02-23T18:05:56.46 0.3 undecidable manual S 337 24.6531 103 -0.16 94
IV.MMO1.HNE. 2020-02-23T18:05:54.04 1.0 undecidable manual P 14 30.8469 99 0.33 30
IV.LNSS.HHZ. 2020-02-23T18:05:54.30 0.3 undecidable manual S 259 16.0728 117 -0.17 95
IV.TERO.HHZ. 2020-02-23T18:05:53.66 0.3 undecidable manual P 91 30.1476 99 0.05 96
IV.RM33.EHZ. 2020-02-23T18:05:53.75 0.3 undecidable manual S 187 13.4754 123 -0.12 97
IV.GAVE.HNZ. 2020-02-23T18:05:53.56 0.6 undecidable manual P 284 28.5492 100 0.19 63
IV.NRCA.HHZ. 2020-02-23T18:05:52.80 0.3 undecidable manual P 337 24.6531 103 0.04 98
IV.SMA1.EHZ. 2020-02-23T18:05:52.82 0.3 undecidable manual S 90 8.2806 142 -0.02 100
IV.LNSS.HHZ. 2020-02-23T18:05:51.59 0.3 undecidable manual P 259 16.0728 117 0.06 99
IV.RM33.EHZ. 2020-02-23T18:05:51.34 0.3 undecidable manual P 187 13.4754 123 0.16 97
IV.SMA1.EHZ. 2020-02-23T18:05:50.83 0.3 undecidable manual P 90 8.2806 142 0.25 95
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SMA1.EHE. ML:0.9 0.000087967355 0.1536 AML other m 2020-02-23T18:05:53.31
IV.SMA1.EHN. ML:1.2 0.0001821999 0.2176 AML other m 2020-02-23T18:05:53.32
IV.RM33.EHE. ML:0.7 0.0000446433 0.1792 AML other m 2020-02-23T18:05:54.36
IV.RM33.EHN. ML:0.7 0.000038237334999999996 0.0768 AML other m 2020-02-23T18:05:54.07
IV.NRCA.HNE. ML:1.0 0.000054049970990000003 0.128 AML other m 2020-02-23T18:05:56.76
IV.NRCA.HHE. ML:1.0 0.000053237315 0.1152 AML other m 2020-02-23T18:05:56.76
IV.NRCA.HHN. ML:0.9 0.000047192120000000007 0.0896 AML other m 2020-02-23T18:05:56.68
IV.TERO.HHE. ML:0.5 0.000014628805 0.064 AML other m 2020-02-23T18:05:57.99
IV.TERO.HHN. ML:0.6 0.000019332534999999997 0.1408 AML other m 2020-02-23T18:05:57.84
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