Earthquake with magnitude of ML 0.9 on date 22-02-2020 and time 00:39:16 (Italy) in region 3 km SE Accumoli (RI)

A magnitude ML 0.9 earthquake occured in region: 3 km SE Accumoli (RI), on

  • 21-02-2020 23:39:16 (UTC)
  • 22-02-2020 00:39:16 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.68, 13.28 at 12 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 3 667 667
Amatrice RI 6 2657 3324
Arquata del Tronto AP 10 1178 4502
Cittareale RI 12 482 4984
Acquasanta Terme AP 15 2916 7900
Campotosto AQ 16 542 8442
Montereale AQ 18 2581 11023
Capitignano AQ 18 665 11688
Montegallo AP 18 523 12211
Valle Castellana TE 19 977 13188
Norcia PG 19 4957 18145

Municipalities with at least 50000 inhabitants

An earthquake occurred to
35 Km W of Teramo (54892 inhabitants)
38 Km N of L'Aquila (69753 inhabitants)
53 Km E of Terni (111501 inhabitants)
56 Km SE of Foligno (57155 inhabitants)
74 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)
88 Km NE of Guidonia Montecelio (88673 inhabitants)
89 Km NE of Tivoli (56533 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Rev 100 ML 0.9 2020-02-21
23:39:16
42.68 13.28 12 2020-02-21
23:51:40
Sala Sismica INGV-Roma 76707971
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-02-21 23:39:16 ± 0.06
Latitude 42.68 ± 0.00
Longitude 13.28 ± 0.00
Depth (km) 12 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 76707971

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 327
Semi-minor axis of confidence ellipse (meter) 175
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 260
Circular confidence region, given by single value of horizontal uncertainty (meter) 330
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 77
Number of associated phases, regardless of their use for origin computation 20
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.15
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.24731
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 9
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.2
Num. used stations 14
Type of magnitude ML
Reference to an origin 76707971
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-02-21 23:51:40
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.VIVA.HHZ. 2020-02-21T23:39:50.32 3.0 undecidable manual S -0.03 0
IV.MURB.HHZ. 2020-02-21T23:39:32.06 3.0 undecidable manual P -0.11 0
IV.TERO.HHZ. 2020-02-21T23:39:26.04 0.3 undecidable manual S 104 0.2473 93 -0.19 71
IV.MMO1.EHZ. 2020-02-21T23:39:25.47 0.3 undecidable manual S 10 0.2194 94 0.08 73
IV.RM33.EHZ. 2020-02-21T23:39:24.12 0.3 undecidable manual S 195 0.1799 97 -0.12 73
IV.NRCA.HHZ. 2020-02-21T23:39:24.27 0.3 undecidable manual S 322 0.1925 96 -0.32 70
IV.LNSS.HHZ. 2020-02-21T23:39:24.50 0.3 undecidable manual S 245 0.1916 96 -0.08 73
IV.CAMP.HHZ. 2020-02-21T23:39:24.03 0.3 undecidable manual S 147 0.1763 97 -0.09 73
IV.MTRA.EHZ. 2020-02-21T23:39:22.19 0.3 undecidable manual S 50 0.1142 114 -0.16 74
IV.TERO.HHZ. 2020-02-21T23:39:22.10 0.6 undecidable manual P 104 0.2473 93 0.01 50
IV.LNSS.HHZ. 2020-02-21T23:39:21.14 0.3 undecidable manual P 245 0.1916 96 0 75
IV.MMO1.EHZ. 2020-02-21T23:39:21.74 0.3 undecidable manual P 10 0.2194 94 0.14 73
IV.SMA1.EHZ. 2020-02-21T23:39:21.06 0.3 undecidable manual S 141 0.0674 137 -0.17 74
IV.NRCA.HHZ. 2020-02-21T23:39:21.10 0.1 undecidable manual P 322 0.1925 96 -0.04 99
IV.T1299.EHZ. 2020-02-21T23:39:20.96 0.3 undecidable manual S 176 0.0495 148 0.06 76
IV.CAMP.HHZ. 2020-02-21T23:39:20.94 0.3 undecidable manual P 147 0.1763 97 0.07 75
IV.RM33.EHZ. 2020-02-21T23:39:20.96 0.1 undecidable manual P 195 0.1799 97 0.03 100
IV.SMA1.EHZ. 2020-02-21T23:39:19.42 0.1 undecidable manual P 141 0.0674 137 0.22 98
IV.MTRA.EHZ. 2020-02-21T23:39:19.98 0.1 undecidable manual P 50 0.1142 114 0.13 99
IV.T1299.EHZ. 2020-02-21T23:39:19.25 0.1 undecidable manual P 176 0.0495 148 0.24 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SMA1.EHE. ML:0.9 0.0001046 0.36 AML other m 2020-02-21T23:39:21.47
IV.SMA1.EHN. ML:0.8 7.435E-5 1.06 AML other m 2020-02-21T23:39:21.93
IV.MTRA.EHN. ML:1 9.485E-5 0.36 AML other m 2020-02-21T23:39:22.42
IV.MTRA.EHE. ML:0.9 8.73E-5 1.42 AML other m 2020-02-21T23:39:22.13
IV.RM33.EHN. ML:0.7 3.26E-5 0.52 AML other m 2020-02-21T23:39:24.22
IV.LNSS.HHN. ML:1 6.51E-5 0.18 AML other m 2020-02-21T23:39:24.61
IV.LNSS.HHE. ML:1 6.97E-5 0.28 AML other m 2020-02-21T23:39:24.57
IV.RM33.EHE. ML:0.7 3.635E-5 0.12 AML other m 2020-02-21T23:39:24.75
IV.NRCA.HHN. ML:0.8 4.14E-5 0.82 AML other m 2020-02-21T23:39:25.42
IV.NRCA.HHE. ML:0.9 5.045E-5 0.98 AML other m 2020-02-21T23:39:25.06
IV.TERO.HHN. ML:0.7 2.575E-5 1.58 AML other m 2020-02-21T23:39:26.14
IV.TERO.HHE. ML:0.5 1.51E-5 1.12 AML other m 2020-02-21T23:39:26.93
IV.MTRA.HNE. ML:1 0.00011160941 1.8688 AML other m 2020-02-21T23:39:22.32
IV.MTRA.HNN. ML:1.1 0.0001243521 0.256 AML other m 2020-02-21T23:39:22.84
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download